{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2025-13767"],"ecosystem":"Go","epss":0.00194,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-fmqf-pmcm-8cx9","id":"tcs_01M5KGCQAB2MCDQ99WJHZB44SR","modified_at":"2026-02-26T17:42:02.028435Z","published_at":"2026-02-26T16:27:46Z","references":["https://osv.dev/vulnerability/GO-2025-4259","https://github.com/advisories/GHSA-fmqf-pmcm-8cx9","https://nvd.nist.gov/vuln/detail/CVE-2025-13767","https://github.com/mattermost/mattermost/commit/b57c297c6d7ae6812d85e32a625806ac9555deee","https://github.com/mattermost/mattermost/pull/34551","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GO-2025-4259#Go/github.com/mattermost/mattermost/server/v8","url":"https://osv.dev/vulnerability/GO-2025-4259"},{"source":"nvd","source_id":"CVE-2025-13767","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-13767"}],"summary":"Mattermost doesn't validate user channel membership when attaching Mattermost posts as comments to Jira issues in github.com/mattermost/mattermost-server"}