{"id":"CVE-2023-38700","summary":"matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms","details":"matrix-appservice-irc is a Node.js IRC bridge for Matrix. Prior to version 1.0.1, it was possible to craft an event such that it would leak part of a targeted message event from another bridged room. This required knowing an event ID to target. Version 1.0.1n fixes this issue. As a workaround, set the `matrixHandler.eventCacheSize` config value to `0`. This workaround may impact performance.","aliases":["GHSA-c7hh-3v6c-fj4q"],"modified":"2026-08-12T03:51:27.944655386Z","published":"2023-08-04T18:05:43.187Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-200"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/38xxx/CVE-2023-38700.json"},"references":[{"type":"WEB","url":"https://github.com/matrix-org/matrix-appservice-irc/releases/tag/1.0.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/38xxx/CVE-2023-38700.json"},{"type":"ADVISORY","url":"https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38700"},{"type":"FIX","url":"https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/matrix-org/matrix-appservice-irc","events":[{"introduced":"0"},{"fixed":"c557cbe011a81a930e0c2cba599ebca021a7cab8"},{"fixed":"8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:matrix:matrix_irc_bridge:*:*:*:*:*:node.js:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.0.1"}]}}],"versions":["1.0.0","1.0.0-rc1","0.37.1","0.36.0","0.33.1","0.33.0","0.33.0-rc2","0.32.0","0.32.0-rc2","0.32.0-rc1","0.31.0","0.31.0-rc1","0.27.0","0.27.0-rc3","0.27.0-rc2","0.27.0-rc1","0.25.0-rc1","0.24.0","0.24.0-rc1","0.23.0-fosdem","0.23.0","0.23.0-rc1","0.22.0","0.22.0-rc1","0.21.0","0.21.0-rc3","0.20.2","develop-2019-02-17","0.15.2","0.14.0-rc4","0.14.0-rc3","0.14.0-rc2","0.14.0-rc1","develop-2019-11-28","develop-2019-11-26","develop-2019-11-15","develop-2019-11-12","matrix-org-testing","0.10.1","v0.9.1","v0.9.0","v0.9.0-rc1","0.7.1","0.7.0","0.5.0","0.1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-38700.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N"}]}