{"id":"CVE-2025-9078","state":"PUBLISHED","title":"Weak cache keys lead to post IDOR and link preview poisoning","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","publishedAt":"2025-09-15T10:10:06.886Z","updatedAt":"2025-09-15T13:57:49.086Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","source":"Mattermost"},"assigner":"Mattermost","products":["Mattermost Mattermost"],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"10.8.0","status":"affected","lessThanOrEqual":"10.8.3","versionType":"semver"},{"version":"10.5.0","status":"affected","lessThanOrEqual":"10.5.8","versionType":"semver"},{"version":"9.11.0","status":"affected","lessThanOrEqual":"9.11.17","versionType":"semver"},{"version":"10.10.0","status":"affected","lessThanOrEqual":"10.10.1","versionType":"semver"},{"version":"10.9.0","status":"affected","lessThanOrEqual":"10.9.3","versionType":"semver"},{"version":"10.11.0","status":"unaffected"},{"version":"10.8.4","status":"unaffected"},{"version":"10.5.9","status":"unaffected"},{"version":"9.11.18","status":"unaffected"},{"version":"10.10.2","status":"unaffected"},{"version":"10.9.4","status":"unaffected"}]}],"references":["https://mattermost.com/security-updates"],"weaknesses":["CWE-328"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/9xxx/CVE-2025-9078.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-9078","state":"PUBLISHED","datePublished":"2025-09-15T10:10:06.886Z","dateUpdated":"2025-09-15T13:57:49.086Z","assignerShortName":"Mattermost","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateReserved":"2025-08-15T15:34:54.442Z"},"containers":{"cna":{"title":"Weak cache keys lead to post IDOR and link preview poisoning","descriptions":[{"lang":"en","value":"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"}],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"10.8.0","status":"affected","lessThanOrEqual":"10.8.3","versionType":"semver"},{"version":"10.5.0","status":"affected","lessThanOrEqual":"10.5.8","versionType":"semver"},{"version":"9.11.0","status":"affected","lessThanOrEqual":"9.11.17","versionType":"semver"},{"version":"10.10.0","status":"affected","lessThanOrEqual":"10.10.1","versionType":"semver"},{"version":"10.9.0","status":"affected","lessThanOrEqual":"10.9.3","versionType":"semver"},{"version":"10.11.0","status":"unaffected"},{"version":"10.8.4","status":"unaffected"},{"version":"10.5.9","status":"unaffected"},{"version":"9.11.18","status":"unaffected"},{"version":"10.10.2","status":"unaffected"},{"version":"10.9.4","status":"unaffected"}]}],"references":[{"url":"https://mattermost.com/security-updates"}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","baseSeverity":"MEDIUM","baseScore":4.3},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-328","lang":"en","type":"CWE","description":"CWE-328: Use of Weak Hash"}]}],"providerMetadata":{"shortName":"Mattermost","orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateUpdated":"2025-09-15T10:10:06.886Z"},"credits":[{"lang":"en","type":"finder","value":"daw10"}],"solutions":[{"value":"Update Mattermost to versions 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.2, 10.9.4 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2025-00495","defect":["https://mattermost.atlassian.net/browse/MM-64449"],"discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-09-15T13:53:35.598807Z","id":"CVE-2025-9078","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-09-15T13:57:49.086Z"}}]}}}