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Purlpkg:apk/alpine/synapse@1.33.2-r0?arch=ppc64le&distroversion=v3.17&reponame=community
Typeapk
Namespacealpine
Namesynapse
Version1.33.2-r0
Qualifiers
arch ppc64le
distroversion v3.17
reponame community
Subpath
Is_vulnerablefalse
Next_non_vulnerable_version1.41.1-r0
Latest_non_vulnerable_version1.61.1-r0
Affected_by_vulnerabilities
Fixing_vulnerabilities
0
url VCID-b461-xbt2-9fg1
vulnerability_id VCID-b461-xbt2-9fg1
summary Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.33.2 "Push rules" can specify conditions under which they will match, including `event_match`, which matches event content against a pattern including wildcards. Certain patterns can cause very poor performance in the matching engine, leading to a denial-of-service when processing moderate length events. The issue is patched in version 1.33.2. A potential workaround might be to prevent users from making custom push rules, by blocking such requests at a reverse-proxy.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-29471
reference_id
reference_type
scores
0
value 0.00337
scoring_system epss
scoring_elements 0.56837
published_at 2026-06-06T12:55:00Z
1
value 0.00337
scoring_system epss
scoring_elements 0.56825
published_at 2026-06-07T12:55:00Z
2
value 0.00337
scoring_system epss
scoring_elements 0.5683
published_at 2026-06-05T12:55:00Z
3
value 0.00337
scoring_system epss
scoring_elements 0.56779
published_at 2026-06-04T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-29471
1
reference_url https://github.com/matrix-org/synapse
reference_id
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value 6.3
scoring_system cvssv4
scoring_elements CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
2
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/matrix-org/synapse
2
reference_url https://github.com/matrix-org/synapse/commit/03318a766cac9f8b053db2214d9c332a977d226c
reference_id
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value 6.3
scoring_system cvssv4
scoring_elements CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
2
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/matrix-org/synapse/commit/03318a766cac9f8b053db2214d9c332a977d226c
3
reference_url https://github.com/matrix-org/synapse/releases/tag/v1.33.2
reference_id
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value 6.3
scoring_system cvssv4
scoring_elements CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
2
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/matrix-org/synapse/releases/tag/v1.33.2
4
reference_url https://github.com/matrix-org/synapse/security/advisories/GHSA-x345-32rc-8h85
reference_id
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value MODERATE
scoring_system cvssv3.1_qr
scoring_elements
2
value 6.3
scoring_system cvssv4
scoring_elements CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/matrix-org/synapse/security/advisories/GHSA-x345-32rc-8h85
5
reference_url https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2021-135.yaml
reference_id
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value 6.3
scoring_system cvssv4
scoring_elements CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
2
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2021-135.yaml
6
reference_url https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY
reference_id
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value 6.3
scoring_system cvssv4
scoring_elements CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
2
value MODERATE
scoring_system generic_textual
scoring_elements
url https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY
7
reference_url https://security.archlinux.org/ASA-202105-19
reference_id ASA-202105-19
reference_type
scores
url https://security.archlinux.org/ASA-202105-19
8
reference_url https://security.archlinux.org/AVG-1943
reference_id AVG-1943
reference_type
scores
0
value Medium
scoring_system archlinux
scoring_elements
url https://security.archlinux.org/AVG-1943
9
reference_url https://nvd.nist.gov/vuln/detail/CVE-2021-29471
reference_id CVE-2021-29471
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value 6.3
scoring_system cvssv4
scoring_elements CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
2
value MODERATE
scoring_system generic_textual
scoring_elements
url https://nvd.nist.gov/vuln/detail/CVE-2021-29471
10
reference_url https://github.com/advisories/GHSA-x345-32rc-8h85
reference_id GHSA-x345-32rc-8h85
reference_type
scores
0
value MODERATE
scoring_system cvssv3.1_qr
scoring_elements
url https://github.com/advisories/GHSA-x345-32rc-8h85
fixed_packages
0
url pkg:apk/alpine/synapse@1.33.2-r0?arch=ppc64le&distroversion=v3.17&reponame=community
purl pkg:apk/alpine/synapse@1.33.2-r0?arch=ppc64le&distroversion=v3.17&reponame=community
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:apk/alpine/synapse@1.33.2-r0%3Farch=ppc64le&distroversion=v3.17&reponame=community
aliases CVE-2021-29471, GHSA-x345-32rc-8h85, PYSEC-2021-135
risk_score 3.1
exploitability 0.5
weighted_severity 6.2
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-b461-xbt2-9fg1
Risk_scorenull
Resource_urlhttp://public2.vulnerablecode.io/packages/pkg:apk/alpine/synapse@1.33.2-r0%3Farch=ppc64le&distroversion=v3.17&reponame=community