{"cve":"CVE-2025-9081","nvd":{"published":"2025-09-19T20:15:40.807","modified":"2026-10-19T16:10:00.260","status":"Analyzed","description":"Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-639"],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T22:10:08.713834912+00:00"},"epss":{"cve":"CVE-2025-9081","score":0.00275,"percentile":0.1968,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-f72g-52v7-mg3p","url":"https://osv.dev/vulnerability/GHSA-f72g-52v7-mg3p","summary":"Mattermost boards plugin fails to restrict download access to files","modified":"2025-09-26T16:23:18Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-plugin-boards","purl":"pkg:golang/github.com/mattermost/mattermost-plugin-boards","ranges":["<0.0.0-20250716054606-3f3e3becfe1d"],"fixed":["0.0.0-20250716054606-3f3e3becfe1d"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":["<8.0.0-20250721095935-11c36f4d1e44"],"fixed":["8.0.0-20250721095935-11c36f4d1e44"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=10.5.0-rc1 <10.5.9"],"fixed":["10.5.9"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=9.11.0-rc1 <9.11.18"],"fixed":["9.11.18"]}]},{"id":"GO-2025-3978","url":"https://osv.dev/vulnerability/GO-2025-3978","summary":"Mattermost boards plugin fails to restrict download access to files in github.com/mattermost/mattermost-plugin-boards","modified":"2026-03-03T04:57:28.885214Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-plugin-boards","purl":"pkg:golang/github.com/mattermost/mattermost-plugin-boards","ranges":["<0.0.0-20250716054606-3f3e3becfe1d"],"fixed":["0.0.0-20250716054606-3f3e3becfe1d"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=9.11.0-rc1+incompatible <9.11.18+incompatible",">=10.5.0-rc1+incompatible <10.5.9+incompatible"],"fixed":["9.11.18+incompatible","10.5.9+incompatible"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","purl":"pkg:golang/github.com/mattermost/mattermost-server/v6","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":["<8.0.0-20250721095935-11c36f4d1e44"],"fixed":["8.0.0-20250721095935-11c36f4d1e44"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}