{"id":"GHSA-xr3w-rmvj-f6m7","revision":"ab0436eabfcd4273bfafb5ce1c822dfe","records":[{"revision":"ab0436eabfcd4273bfafb5ce1c822dfe","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-xr3w-rmvj-f6m7","aliases":["CVE-2025-54499","GO-2025-4036"],"title":"Mattermost has an Observable Timing Discrepancy vulnerability","description":"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.","state":0,"publishedAt":"2025-10-16T09:30:24+00:00","modifiedAt":"2025-11-05T19:57:38.749472+00:00","affected":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"8.0.0-20250728063359-38208b8f065f"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.5.0"},{"kind":"fixed","version":"10.5.11"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.11.0"},{"kind":"fixed","version":"10.11.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2025-54499","https://github.com/mattermost/mattermost/commit/38208b8f065f0786eac0e968f9d754b91b62878c","https://github.com/mattermost/mattermost/commit/97a4c7839cf5610cfe17c52042878aebb7678372","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"sourceUrl":"https://github.com/advisories/GHSA-xr3w-rmvj-f6m7","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-xr3w-rmvj-f6m7","identifiers":["GHSA-xr3w-rmvj-f6m7","CVE-2025-54499","GO-2025-4036"]},"retained":false,"historicalAffected":[]}],"coverage":[]}