{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3524","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","state":"PUBLISHED","assignerShortName":"Mattermost","dateReserved":"2026-03-04T16:15:21.152Z","datePublished":"2026-04-06T12:06:22.092Z","dateUpdated":"2026-04-07T03:55:35.396Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"1.1.4","status":"affected","version":"0","versionType":"semver"},{"version":"1.1.5","status":"unaffected"}]}],"credits":[{"lang":"en","type":"finder","value":"Hassan Mohammed"}],"descriptions":[{"lang":"en","value":"Mattermost Plugin Legal Hold versions <=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621"}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseSeverity":"HIGH","baseScore":8.3},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-862: Missing Authorization","cweId":"CWE-862"}]}],"references":[{"url":"https://mattermost.com/security-updates","name":"MMSA-2026-00621","tags":["vendor-advisory"]}],"solutions":[{"value":"Update Mattermost Plugins to versions 1.1.5 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2026-00621","defect":["https://mattermost.atlassian.net/browse/MM-67763"],"discovery":"{\"self\"=>\"https://mattermost.atlassian.net/rest/api/2/customFieldOption/10557\", \"value\"=>\"Internal\", \"id\"=>\"10557\"}"},"title":"Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check","providerMetadata":{"orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","shortName":"Mattermost","dateUpdated":"2026-04-06T12:06:22.092Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-06T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-3524"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-07T03:55:35.396Z"}}]}}