{"id":"CVE-2022-39203","aliases":["GHSA-xvqg-mv25-rwvw"],"url":"https://o3.security/vulnerability/CVE-2022-39203","summary":"Parsing issue in matrix-org/node-irc leading to room takeovers","details":"matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. Attackers can specify a specific string of characters, which would confuse the bridge into combining an attacker-owned channel and an existing channel, allowing them to grant themselves permissions in the channel. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround operators may disable dynamic channel joining via `dynamicChannels.enabled` to prevent users from joining new channels, which prevents any new channels being bridged outside of what is already bridged, and what is specified in the config.","published":"2022-09-13T18:15:12Z","modified":"2026-07-15T01:49:21.250910700Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"matrix-appservice-irc","fixedVersion":"0.35.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39203.json"},{"type":"ADVISORY","url":"https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqg-mv25-rwvw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-39203"},{"type":"ARTICLE","url":"https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:21.250910700Z"}}