{"action":"Upgrade github.com/mattermost/mattermost-server to 9.11.18+incompatible or later.","affected":[{"fixed":"9.11.18+incompatible","introduced":"9.11.0-rc1+incompatible"},{"fixed":"10.5.9+incompatible","introduced":"10.5.0-rc1+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2025-9081"],"ecosystem":"Go","epss":0.00275,"exploited":false,"fixed_versions":["9.11.18+incompatible","10.5.9+incompatible"],"ghsa_id":"GHSA-f72g-52v7-mg3p","id":"tcs_01M5KGAKFDNQYFFZPCVZRKGK2A","modified_at":"2026-03-03T04:57:28.885214Z","published_at":"2025-09-24T19:21:41Z","references":["https://osv.dev/vulnerability/GO-2025-3978","https://github.com/advisories/GHSA-f72g-52v7-mg3p","https://nvd.nist.gov/vuln/detail/CVE-2025-9081","https://github.com/mattermost/mattermost-plugin-boards/commit/3f3e3becfe1d66db0d0f4fd235f04afd6e1ec40b","https://github.com/mattermost/mattermost-plugin-boards/pull/114","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GO-2025-3978#Go/github.com/mattermost/mattermost-server","url":"https://osv.dev/vulnerability/GO-2025-3978"},{"source":"nvd","source_id":"CVE-2025-9081","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-9081"}],"summary":"Mattermost boards plugin fails to restrict download access to files in github.com/mattermost/mattermost-plugin-boards"}