{"schema_version":"1.9.0","id":"GHSA-xr3w-rmvj-f6m7","published":"2025-10-16T09:30:24Z","modified":"2025-11-05T19:57:38.749472Z","aliases":["CVE-2025-54499","GO-2025-4036"],"summary":"Mattermost has an Observable Timing Discrepancy vulnerability","details":"Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to use constant-time comparison for sensitive string comparisons which allows attackers to exploit timing oracles to perform byte-by-byte brute force attacks via response time analysis on Cloud API keys and OAuth client secrets.","affected":[{"package":{"name":"github.com/mattermost/mattermost/server/v8","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.0.0-20250728063359-38208b8f065f"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-xr3w-rmvj-f6m7/GHSA-xr3w-rmvj-f6m7.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"10.5.0"},{"fixed":"10.5.11"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-xr3w-rmvj-f6m7/GHSA-xr3w-rmvj-f6m7.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"10.11.0"},{"fixed":"10.11.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-xr3w-rmvj-f6m7/GHSA-xr3w-rmvj-f6m7.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54499"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/38208b8f065f0786eac0e968f9d754b91b62878c"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/97a4c7839cf5610cfe17c52042878aebb7678372"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"database_specific":{"cwe_ids":["CWE-208"],"github_reviewed":true,"github_reviewed_at":"2025-10-16T21:04:21Z","nvd_published_at":"2025-10-16T09:15:34Z","severity":"LOW"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}