{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"status":"affected","version":"9.6.0"},{"lessThanOrEqual":"9.5.2","status":"affected","version":"9.5.0","versionType":"semver"},{"lessThanOrEqual":"8.1.11","status":"affected","version":"8.1.0","versionType":"semver"},{"status":"unaffected","version":"9.7.0"},{"status":"unaffected","version":"9.6.1"},{"status":"unaffected","version":"9.5.3"},{"status":"unaffected","version":"8.1.12"}]}],"source":"responsibledisclosure@mattermost.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","matchCriteriaId":"78A6C1F3-95B8-4231-B5D8-C8BB65EA9BFB","versionEndExcluding":"8.1.12","versionStartIncluding":"8.1.0","vulnerable":true},{"criteria":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","matchCriteriaId":"D4846F2D-56D5-4D24-BF0D-2075072A6ADF","versionEndExcluding":"9.5.3","versionStartIncluding":"9.5.0","vulnerable":true},{"criteria":"cpe:2.3:a:mattermost:mattermost_server:9.6.0:-:*:*:*:*:*:*","matchCriteriaId":"B0F7F432-11D4-428C-BBD6-91AE6B9511B7","vulnerable":true},{"criteria":"cpe:2.3:a:mattermost:mattermost_server:9.6.0:rc1:*:*:*:*:*:*","matchCriteriaId":"8DF0295A-E584-46BD-88CE-E550482D888D","vulnerable":true},{"criteria":"cpe:2.3:a:mattermost:mattermost_server:9.6.0:rc2:*:*:*:*:*:*","matchCriteriaId":"798A87CB-1341-4879-9922-8645E6D49DB4","vulnerable":true},{"criteria":"cpe:2.3:a:mattermost:mattermost_server:9.6.0:rc3:*:*:*:*:*:*","matchCriteriaId":"245EC64C-50A7-4F6E-B8F6-A5E45CA009EB","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes which allows an attacker authenticated as team admin to demote users to guest via crafted HTTP requests.\n\n"},{"lang":"es","value":"Las versiones de Mattermost 9.6.0, 9.5.x anteriores a 9.5.3 y 8.1.x anteriores a 8.1.12 no validan completamente los cambios de roles, lo que permite a un atacante autenticado como administrador del equipo degradar a los usuarios a invitados a través de solicitudes HTTP manipuladas."}],"id":"CVE-2024-4198","lastModified":"2026-06-17T08:01:18.843","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":2.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"exploitabilityScore":1.2,"impactScore":1.4,"source":"responsibledisclosure@mattermost.com","type":"Secondary"},{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":2.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"exploitabilityScore":1.2,"impactScore":1.4,"source":"nvd@nist.gov","type":"Primary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2024-4198","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","timestamp":"2024-07-24T19:30:28.234536Z","version":"2.0.3"}}]},"published":"2024-04-26T09:15:13.097","references":[{"source":"responsibledisclosure@mattermost.com","tags":["Vendor Advisory"],"url":"https://mattermost.com/security-updates"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"url":"https://mattermost.com/security-updates"}],"sourceIdentifier":"responsibledisclosure@mattermost.com","vulnStatus":"Analyzed","weaknesses":[{"description":[{"lang":"en","value":"CWE-284"}],"source":"responsibledisclosure@mattermost.com","type":"Secondary"},{"description":[{"lang":"en","value":"NVD-CWE-noinfo"}],"source":"nvd@nist.gov","type":"Primary"}]}