mattermost security advisories
2 threat alerts tracking vulnerabilities and security advisories that affect mattermost products.
Vulnios monitors mattermost CVE feeds, vendor advisories, CISA KEV listings, and exploit-prediction data continuously. Each alert below is enriched with severity, exploitation status, affected products, and a remediation path. Use this page to scan recent mattermost security news in one place, or click into an individual alert for full detail.
Critical Vulnerability: CVE-2025-12419 — mattermost — mattermost_server
Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authen
criticalCVE-2025-12419Critical Vulnerability: CVE-2025-12421 — mattermost — mattermost_server
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication f
criticalCVE-2025-12421
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