{"url":"http://public2.vulnerablecode.io/api/packages/380724?format=json","purl":"pkg:npm/matrix-appservice-bridge@8.1.2","type":"npm","namespace":"","name":"matrix-appservice-bridge","version":"8.1.2","qualifiers":{},"subpath":"","is_vulnerable":false,"next_non_vulnerable_version":"9.0.1","latest_non_vulnerable_version":"9.0.1","affected_by_vulnerabilities":[],"fixing_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/132246?format=json","vulnerability_id":"VCID-3xd2-815c-zqf1","summary":"matrix-appservice-bridge provides an API for setting up bridges. Starting in version 4.0.0 and prior to versions 8.1.2 and 9.0.1, a malicious Matrix server can use a foreign user's MXID in an OpenID exchange, allowing a bad actor to impersonate users when using the provisioning API. The library does not check that the servername part of the `sub` parameter (containing the user's *claimed* MXID) is the the same as the servername we are talking to. A malicious actor could spin up a server on any given domain, respond with a `sub` parameter according to the user they want to act as and use the resulting token to perform provisioning requests. Versions 8.1.2 and 9.0.1 contain a patch. As a workaround, disable the provisioning API.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-38691","reference_id":"","reference_type":"","scores":[{"value":"0.00083","scoring_system":"epss","scoring_elements":"0.24295","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-38691"},{"reference_url":"https://github.com/matrix-org/matrix-appservice-bridge","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/matrix-appservice-bridge"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38691","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38691"},{"reference_url":"https://github.com/matrix-org/matrix-appservice-bridge/commit/4c6723a5e7beda65cdf1ae5dbb882e8beaac8552","reference_id":"4c6723a5e7beda65cdf1ae5dbb882e8beaac8552","reference_type":"","scores":[{"value":"5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-07T13:01:18Z/"}],"url":"https://github.com/matrix-org/matrix-appservice-bridge/commit/4c6723a5e7beda65cdf1ae5dbb882e8beaac8552"},{"reference_url":"https://github.com/matrix-org/matrix-appservice-bridge/security/advisories/GHSA-vc7j-h8xg-fv5x","reference_id":"GHSA-vc7j-h8xg-fv5x","reference_type":"","scores":[{"value":"5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-07T13:01:18Z/"}],"url":"https://github.com/matrix-org/matrix-appservice-bridge/security/advisories/GHSA-vc7j-h8xg-fv5x"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/380724?format=json","purl":"pkg:npm/matrix-appservice-bridge@8.1.2","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/matrix-appservice-bridge@8.1.2"},{"url":"http://public2.vulnerablecode.io/api/packages/380726?format=json","purl":"pkg:npm/matrix-appservice-bridge@9.0.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/matrix-appservice-bridge@9.0.1"}],"aliases":["CVE-2023-38691","GHSA-vc7j-h8xg-fv5x"],"risk_score":null,"exploitability":null,"weighted_severity":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-3xd2-815c-zqf1"}],"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/matrix-appservice-bridge@8.1.2"}