Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/64098?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/64098?format=api", "purl": "pkg:pypi/matrix-sydent@2.1.0", "type": "pypi", "namespace": "", "name": "matrix-sydent", "version": "2.1.0", "qualifiers": {}, "subpath": "", "is_vulnerable": true, "next_non_vulnerable_version": "2.5.6", "latest_non_vulnerable_version": "2.5.6", "affected_by_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/218130?format=api", "vulnerability_id": "VCID-2t4j-nm56-tkgm", "summary": "Sydent is a reference Matrix identity server. Sydent does not limit the size of requests it receives from HTTP clients. A malicious user could send an HTTP request with a very large body, leading to memory exhaustion and denial of service. Sydent also does not limit response size for requests it makes to remote Matrix homeservers. A malicious homeserver could return a very large response, again leading to memory exhaustion and denial of service. This affects any server which accepts registration requests from untrusted clients. This issue has been patched by releases 89071a1, 0523511, f56eee3. As a workaround request sizes can be limited in an HTTP reverse-proxy. There are no known workarounds for the problem with overlarge responses.", "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29430", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.01367", "scoring_system": "epss", "scoring_elements": "0.80614", "published_at": "2026-06-11T12:55:00Z" }, { "value": "0.01367", "scoring_system": "epss", "scoring_elements": "0.80674", "published_at": "2026-06-12T12:55:00Z" }, { "value": "0.01367", "scoring_system": "epss", "scoring_elements": "0.80686", "published_at": "2026-06-13T12:55:00Z" }, { "value": "0.01367", "scoring_system": "epss", "scoring_elements": "0.80678", "published_at": "2026-06-14T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29430" }, { "reference_url": "https://github.com/matrix-org/sydent", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/0523511d2fb40f2738f8a8549868f44b96e5dab7", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/0523511d2fb40f2738f8a8549868f44b96e5dab7" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/89071a1a754c69a50deac89e6bb74002d4cda19d", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/89071a1a754c69a50deac89e6bb74002d4cda19d" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/f56eee315b6c44fdd9f6aa785cc2ec744a594428", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/f56eee315b6c44fdd9f6aa785cc2ec744a594428" }, { "reference_url": "https://github.com/matrix-org/sydent/releases/tag/v2.3.0", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/releases/tag/v2.3.0" }, { "reference_url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-wmg4-8cp2-hpg9", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-wmg4-8cp2-hpg9" }, { "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-21.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-21.yaml" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29430", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29430" }, { "reference_url": "https://pypi.org/project/matrix-sydent", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://pypi.org/project/matrix-sydent" }, { "reference_url": "https://pypi.org/project/matrix-sydent/", "reference_id": "", "reference_type": "", "scores": [], "url": "https://pypi.org/project/matrix-sydent/" }, { "reference_url": "https://github.com/advisories/GHSA-wmg4-8cp2-hpg9", "reference_id": "GHSA-wmg4-8cp2-hpg9", "reference_type": "", "scores": [ { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-wmg4-8cp2-hpg9" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/64100?format=api", "purl": "pkg:pypi/matrix-sydent@2.3.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-qv9q-g8dy-wuda" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-sydent@2.3.0" } ], "aliases": [ "CVE-2021-29430", "GHSA-wmg4-8cp2-hpg9", "PYSEC-2021-21" ], "risk_score": 4.0, "exploitability": "0.5", "weighted_severity": "8.0", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-2t4j-nm56-tkgm" }, { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/218131?format=api", "vulnerability_id": "VCID-6ydp-qbur-zkcw", "summary": "Sydent is a reference Matrix identity server. Sydent can be induced to send HTTP GET requests to internal systems, due to lack of parameter validation or IP address blacklisting. It is not possible to exfiltrate data or control request headers, but it might be possible to use the attack to perform an internal port enumeration. This issue has been addressed in in 9e57334, 8936925, 3d531ed, 0f00412. A potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.", "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29431", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00303", "scoring_system": "epss", "scoring_elements": "0.53976", "published_at": "2026-06-11T12:55:00Z" }, { "value": "0.00303", "scoring_system": "epss", "scoring_elements": "0.54101", "published_at": "2026-06-12T12:55:00Z" }, { "value": "0.00303", "scoring_system": "epss", "scoring_elements": "0.54119", "published_at": "2026-06-13T12:55:00Z" }, { "value": "0.00303", "scoring_system": "epss", "scoring_elements": "0.54106", "published_at": "2026-06-14T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29431" }, { "reference_url": "https://github.com/matrix-org/sydent", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f" }, { "reference_url": "https://github.com/matrix-org/sydent/releases/tag/v2.3.0", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/releases/tag/v2.3.0" }, { "reference_url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4" }, { "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-22.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-22.yaml" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29431", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29431" }, { "reference_url": "https://pypi.org/project/matrix-sydent", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.7", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N" }, { "value": "6.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://pypi.org/project/matrix-sydent" }, { "reference_url": "https://pypi.org/project/matrix-sydent/", "reference_id": "", "reference_type": "", "scores": [], "url": "https://pypi.org/project/matrix-sydent/" }, { "reference_url": "https://github.com/advisories/GHSA-9jhm-8m8c-c3f4", "reference_id": "GHSA-9jhm-8m8c-c3f4", "reference_type": "", "scores": [ { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-9jhm-8m8c-c3f4" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/64100?format=api", "purl": "pkg:pypi/matrix-sydent@2.3.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-qv9q-g8dy-wuda" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-sydent@2.3.0" } ], "aliases": [ "CVE-2021-29431", "GHSA-9jhm-8m8c-c3f4", "PYSEC-2021-22" ], "risk_score": 3.5, "exploitability": "0.5", "weighted_severity": "6.9", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-6ydp-qbur-zkcw" }, { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/218129?format=api", "vulnerability_id": "VCID-83jx-ejpc-1kdq", "summary": "Sydent is a reference matrix identity server. A malicious user could abuse Sydent to send out arbitrary emails from the Sydent email address. This could be used to construct plausible phishing emails, for example. This issue has been fixed in 4469d1d.", "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29432", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.0025", "scoring_system": "epss", "scoring_elements": "0.48626", "published_at": "2026-06-11T12:55:00Z" }, { "value": "0.0025", "scoring_system": "epss", "scoring_elements": "0.48763", "published_at": "2026-06-12T12:55:00Z" }, { "value": "0.0025", "scoring_system": "epss", "scoring_elements": "0.48782", "published_at": "2026-06-13T12:55:00Z" }, { "value": "0.0025", "scoring_system": "epss", "scoring_elements": "0.48769", "published_at": "2026-06-14T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29432" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N" }, { "value": "6.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42" }, { "reference_url": "https://github.com/matrix-org/sydent/releases/tag/v2.3.0", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N" }, { "value": "6.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/releases/tag/v2.3.0" }, { "reference_url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-mh74-4m5g-fcjx", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N" }, { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "6.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-mh74-4m5g-fcjx" }, { "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-23.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N" }, { "value": "6.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-23.yaml" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29432", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N" }, { "value": "6.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29432" }, { "reference_url": "https://pypi.org/project/matrix-sydent", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N" }, { "value": "6.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://pypi.org/project/matrix-sydent" }, { "reference_url": "https://pypi.org/project/matrix-sydent/", "reference_id": "", "reference_type": "", "scores": [], "url": "https://pypi.org/project/matrix-sydent/" }, { "reference_url": "https://github.com/advisories/GHSA-mh74-4m5g-fcjx", "reference_id": "GHSA-mh74-4m5g-fcjx", "reference_type": "", "scores": [ { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-mh74-4m5g-fcjx" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/64100?format=api", "purl": "pkg:pypi/matrix-sydent@2.3.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-qv9q-g8dy-wuda" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-sydent@2.3.0" } ], "aliases": [ "CVE-2021-29432", "GHSA-mh74-4m5g-fcjx", "PYSEC-2021-23" ], "risk_score": 3.1, "exploitability": "0.5", "weighted_severity": "6.2", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-83jx-ejpc-1kdq" }, { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/218128?format=api", "vulnerability_id": "VCID-ckar-nhrw-uuhn", "summary": "### Impact Missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. ### Patches Fixed by 3175fd3. ### Workarounds There are no known workarounds. ### References n/a ### For more information If you have any questions or comments about this advisory, email us at security@matrix.org.", "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29433", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00281", "scoring_system": "epss", "scoring_elements": "0.51787", "published_at": "2026-06-11T12:55:00Z" }, { "value": "0.00281", "scoring_system": "epss", "scoring_elements": "0.51917", "published_at": "2026-06-12T12:55:00Z" }, { "value": "0.00281", "scoring_system": "epss", "scoring_elements": "0.51929", "published_at": "2026-06-13T12:55:00Z" }, { "value": "0.00281", "scoring_system": "epss", "scoring_elements": "0.51914", "published_at": "2026-06-14T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29433" }, { "reference_url": "https://github.com/matrix-org/sydent", "reference_id": "", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/3175fd358ebc2c310eab7a3dbf296ce2bd54c1da", "reference_id": "", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/commit/3175fd358ebc2c310eab7a3dbf296ce2bd54c1da" }, { "reference_url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-pw4v-gr34-2553", "reference_id": "", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L" }, { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-pw4v-gr34-2553" }, { "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-24.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-24.yaml" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29433", "reference_id": "", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29433" }, { "reference_url": "https://pypi.org/project/matrix-sydent", "reference_id": "", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://pypi.org/project/matrix-sydent" }, { "reference_url": "https://pypi.org/project/matrix-sydent/", "reference_id": "", "reference_type": "", "scores": [], "url": "https://pypi.org/project/matrix-sydent/" }, { "reference_url": "https://github.com/advisories/GHSA-pw4v-gr34-2553", "reference_id": "GHSA-pw4v-gr34-2553", "reference_type": "", "scores": [ { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-pw4v-gr34-2553" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/64100?format=api", "purl": "pkg:pypi/matrix-sydent@2.3.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-qv9q-g8dy-wuda" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-sydent@2.3.0" } ], "aliases": [ "CVE-2021-29433", "GHSA-pw4v-gr34-2553", "PYSEC-2021-24" ], "risk_score": 3.1, "exploitability": "0.5", "weighted_severity": "6.2", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-ckar-nhrw-uuhn" }, { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/131884?format=api", "vulnerability_id": "VCID-qv9q-g8dy-wuda", "summary": "Sydent is an identity server for the Matrix communications protocol. Prior to version 2.5.6, if configured to send emails using TLS, Sydent does not verify SMTP servers' certificates. This makes Sydent's emails vulnerable to interception via a man-in-the-middle (MITM) attack. Attackers with privileged access to the network can intercept room invitations and address confirmation emails. This is patched in Sydent 2.5.6. When patching, make sure that Sydent trusts the certificate of the server it is connecting to. This should happen automatically when using properly issued certificates. Those who use self-signed certificates should make sure to copy their Certification Authority certificate, or their self signed certificate if using only one, to the trust store of your operating system. As a workaround, one can ensure Sydent's emails fail to send by setting the configured SMTP server to a loopback or non-routable address under one's control which does not have a listening SMTP server.", "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2023-38686", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00064", "scoring_system": "epss", "scoring_elements": "0.20435", "published_at": "2026-06-12T12:55:00Z" }, { "value": "0.00064", "scoring_system": "epss", "scoring_elements": "0.20434", "published_at": "2026-06-14T12:55:00Z" }, { "value": "0.00064", "scoring_system": "epss", "scoring_elements": "0.20456", "published_at": "2026-06-13T12:55:00Z" }, { "value": "0.00064", "scoring_system": "epss", "scoring_elements": "0.20259", "published_at": "2026-06-11T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2023-38686" }, { "reference_url": "https://github.com/matrix-org/sydent", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/sydent" }, { "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2023-139.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2023-139.yaml" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2023-38686", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-38686" }, { "reference_url": "https://peps.python.org/pep-0476", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://peps.python.org/pep-0476" }, { "reference_url": "https://github.com/matrix-org/sydent/commit/1cd748307c6b168b66154e6c4db715d4b9551261", "reference_id": "1cd748307c6b168b66154e6c4db715d4b9551261", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N" }, { "value": "9.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track*", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-10-08T17:45:32Z/" } ], "url": "https://github.com/matrix-org/sydent/commit/1cd748307c6b168b66154e6c4db715d4b9551261" }, { "reference_url": "https://github.com/matrix-org/sydent/pull/574", "reference_id": "574", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N" }, { "value": "9.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track*", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-10-08T17:45:32Z/" } ], "url": "https://github.com/matrix-org/sydent/pull/574" }, { "reference_url": "https://github.com/python/cpython/issues/91826", "reference_id": "91826", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N" }, { "value": "9.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track*", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-10-08T17:45:32Z/" } ], "url": "https://github.com/python/cpython/issues/91826" }, { "reference_url": "https://github.com/advisories/GHSA-p6hw-wm59-3g5g", "reference_id": "GHSA-p6hw-wm59-3g5g", "reference_type": "", "scores": [ { "value": "CRITICAL", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-p6hw-wm59-3g5g" }, { "reference_url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-p6hw-wm59-3g5g", "reference_id": "GHSA-p6hw-wm59-3g5g", 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