{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-14822","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","state":"PUBLISHED","assignerShortName":"Mattermost","dateReserved":"2025-12-17T11:54:59.643Z","datePublished":"2026-01-16T08:52:43.848Z","dateUpdated":"2026-01-16T13:00:45.911Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"10.11.8","status":"affected","version":"10.11.0","versionType":"semver"},{"version":"11.2.0","status":"unaffected"},{"version":"10.11.9","status":"unaffected"}]}],"credits":[{"lang":"en","type":"finder","value":"CatenaCyber"}],"descriptions":[{"lang":"en","value":"Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens"}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","baseSeverity":"LOW","baseScore":3.1},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-407: Inefficient Algorithmic Complexity","cweId":"CWE-407"}]}],"references":[{"url":"https://mattermost.com/security-updates"}],"solutions":[{"value":"Update Mattermost to versions 11.2.0, 10.11.9 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2025-00543","defect":["https://mattermost.atlassian.net/browse/MM-66251"],"discovery":"EXTERNAL"},"title":"DoS from quadratic complexity in model.ParseHashtags","providerMetadata":{"orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","shortName":"Mattermost","dateUpdated":"2026-01-16T08:52:43.848Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-16T12:58:47.553648Z","id":"CVE-2025-14822","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-16T13:00:45.911Z"}}]}}