{"cve":"CVE-2025-9078","nvd":{"published":"2025-09-15T10:15:32.627","modified":"2026-10-19T17:10:00.173","status":"Analyzed","description":"Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-328"],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T22:08:41.295252406+00:00"},"epss":{"cve":"CVE-2025-9078","score":0.00154,"percentile":0.04504,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-9p92-x77w-9fw2","url":"https://osv.dev/vulnerability/GHSA-9p92-x77w-9fw2","summary":"Mattermost makes Use of Weak Hash","modified":"2025-09-17T17:42:10.713067Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=10.8.0 <10.8.4"],"fixed":["10.8.4"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=10.5.0 <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 <9.11.18"],"fixed":["9.11.18"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=10.10.0 <10.10.2"],"fixed":["10.10.2"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=10.9.0 <10.9.4"],"fixed":["10.9.4"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":["<8.0.0-20250718075842-cd87e5c87737"],"fixed":["8.0.0-20250718075842-cd87e5c87737"]}]},{"id":"GO-2025-3959","url":"https://osv.dev/vulnerability/GO-2025-3959","summary":"Mattermost makes Use of Weak Hash in github.com/mattermost/mattermost-server","modified":"2026-03-03T04:56:55.592311Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=9.11.0+incompatible <9.11.18+incompatible",">=10.5.0+incompatible <10.5.9+incompatible",">=10.8.0+incompatible <10.8.4+incompatible",">=10.9.0+incompatible <10.9.4+incompatible",">=10.10.0+incompatible <10.10.2+incompatible"],"fixed":["9.11.18+incompatible","10.5.9+incompatible","10.8.4+incompatible","10.9.4+incompatible","10.10.2+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":["<8.0.0-20250718075842-cd87e5c87737"],"fixed":["8.0.0-20250718075842-cd87e5c87737"]}]}],"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."]}