{"id":"CVE-2022-39203","aliases":["EUVD-2022-6983","GHSA-xvqg-mv25-rwvw"],"status":"published","title":"Parsing issue in matrix-org/node-irc leading to room takeovers","description":"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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00882,"percentile":0.59467,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-269"],"published":"2022-09-13T18:15:12Z","modified":"2026-10-28T02:31:00Z","fixes":[{"ecosystem":"npm","package":"matrix-appservice-irc","fixed_in":["0.35.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"matrix-appservice-irc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.35.0"}]}]},{"source":"osv","ecosystem":"npm","package":"matrix-appservice-irc","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.35.0"}]}]}],"products":[{"vendor":"matrix","product":"matrix_irc_bridge"},{"vendor":"matrix-org","product":"matrix-appservice-irc"}],"references":[{"url":"https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","article"]},{"url":"https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqg-mv25-rwvw","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-39203","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-xvqg-mv25-rwvw"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39203.json","tags":["advisory"]},{"url":"https://github.com/matrix-org/matrix-appservice-irc","tags":["package"]},{"url":"https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2022-39203","title":"Parsing issue in matrix-org/node-irc leading to room takeovers","description":"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.","status":"published","published":"2022-09-13T18:15:12Z","modified":"2025-04-23T17:11:08.544Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:34:39.233406Z"}],"euvd":[{"id":"EUVD-2022-6983","description":"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.","status":"published","published":"2022-09-13T18:15:12Z","modified":"2025-04-23T17:11:08Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:10.906327Z"}],"ghsa":[{"id":"GHSA-xvqg-mv25-rwvw","title":"Parsing issue in matrix-org/node-irc leading to room takeovers","description":"### Impact\n\nAttackers 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.\n\n### Patched\n\nThe vulnerability has been patched in matrix-appservice-irc 0.35.0.\n\n### Workarounds\n\nDisable 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.\n\n### References\n\n- https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity\n\n### Credits\n\nDiscovered and reported by [Val Lorentz](https://valentin-lorentz.fr/).\n\n### For more information\n\nIf you have any questions or comments about this advisory email us at [security@matrix.org](mailto:security@matrix.org).","status":"published","published":"2022-09-15T03:26:10Z","modified":"2023-01-29T05:00:51Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:36:25.064927Z"}],"nvd":[{"id":"CVE-2022-39203","description":"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.","status":"published","published":"2022-09-13T19:15:13.03Z","modified":"2026-06-17T04:57:54.513Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:07:27.631109Z"}],"osv":[{"id":"CVE-2022-39203","title":"Parsing issue in matrix-org/node-irc leading to room takeovers","description":"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.","status":"published","published":"2022-09-13T18:15:12Z","modified":"2026-10-28T02:31:00.265142516Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:44:26.53798Z"},{"id":"GHSA-xvqg-mv25-rwvw","title":"Parsing issue in matrix-org/node-irc leading to room takeovers","description":"### Impact\n\nAttackers 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.\n\n### Patched\n\nThe vulnerability has been patched in matrix-appservice-irc 0.35.0.\n\n### Workarounds\n\nDisable 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.\n\n### References\n\n- https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity\n\n### Credits\n\nDiscovered and reported by [Val Lorentz](https://valentin-lorentz.fr/).\n\n### For more information\n\nIf you have any questions or comments about this advisory email us at [security@matrix.org](mailto:security@matrix.org).","status":"published","published":"2022-09-15T03:26:10Z","modified":"2023-11-08T04:10:14.997329Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:47:00.604718Z"}]}}