{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-2461","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","state":"PUBLISHED","assignerShortName":"Mattermost","dateReserved":"2026-02-13T11:09:37.505Z","datePublished":"2026-03-16T11:16:32.720Z","dateUpdated":"2026-03-16T13:49:57.924Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"11.0.3","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"11.2.2","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"10.10.11","status":"affected","version":"0","versionType":"semver"},{"version":"11.4.0","status":"unaffected"},{"version":"11.3.1","status":"unaffected"},{"version":"11.2.3","status":"unaffected"},{"version":"10.11.11","status":"unaffected"}]}],"credits":[{"lang":"en","type":"finder","value":"daynight"}],"descriptions":[{"lang":"en","value":"Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members.  Mattermost Advisory ID: MMSA-2025-00559"}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","baseSeverity":"MEDIUM","baseScore":4.3},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-639: Authorization Bypass Through User-Controlled Key","cweId":"CWE-639"}]}],"references":[{"url":"https://mattermost.com/security-updates","name":"MMSA-2025-00559","tags":["vendor-advisory"]}],"solutions":[{"value":"Update Mattermost Plugins to versions 11.4.0, 11.3.1, 11.2.3, 10.11.11 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2025-00559","defect":["https://mattermost.atlassian.net/browse/MM-66751"],"discovery":"EXTERNAL"},"title":"Missing authorization check allows unauthorized modification of other users' comments on a board","providerMetadata":{"orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","shortName":"Mattermost","dateUpdated":"2026-03-16T11:16:32.720Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-2461","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-03-16T13:42:41.162405Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-16T13:49:57.924Z"}}]}}