mattermost Vulnerability Advisory Catalog

Total 602 security vulnerabilities recorded for mattermost software and firmware.

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CVE-2026-2457 MEDIUM
Component: mattermost_server

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to sanitize client-supplied post metadata which allows an authenticat...

📅 2026-03-16
CVSS 4.3 Dossier →
CVE-2026-2456 MEDIUM
Component: mattermost_server

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 Mattermost fails to limit the size of responses from integration action en...

📅 2026-03-16
CVSS 5.3 Dossier →
Component: mattermost_server

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to bound memory allocation when processing PSD image files which allo...

📅 2026-03-16
CVSS 4.3 Dossier →
Component: mattermost_server

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly validate User-Agent header tokens which allows an authent...

📅 2026-03-16
CVSS 4.3 Dossier →
Component: mattermost_server

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to bound memory allocation when processing DOC files which allows an ...

📅 2026-03-16
CVSS 4.3 Dossier →
Component: mattermost_server

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly handle very long passwords, which allows an attacker to o...

📅 2026-03-16
CVSS 7.5 Dossier →
CVE-2026-1628 MEDIUM
Component: mattermost_desktop

Mattermost Desktop App versions <=5.13.3 fail to attach listeners restricting navigation to external sites within the Mattermost app which allows a ma...

📅 2026-03-02
CVSS 4.6 Dossier →
Component: mattermost_desktop

Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary execu...

📅 2026-02-16
CVSS 7.6 Dossier →
Component: mattermost_server

Mattermost versions 10.11.x <= 10.11.9 fail to enforce invite permissions when updating team settings, which allows team administrators without proper...

📅 2026-02-16
CVSS 3.8 Dossier →
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions ...

📅 2026-02-16
CVSS 4.3 Dossier →
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to sanitize sensitive data in WebSocket messages which allows authenti...

📅 2026-02-16
CVSS 5.7 Dossier →
CVE-2026-0999 MEDIUM
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate login method restrictions which allows an authent...

📅 2026-02-16
CVSS 5.4 Dossier →
CVE-2026-0998 MEDIUM
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 and Mattermost Plugin Zoom versions <=1.11.0 fail to validate user identity...

📅 2026-02-16
CVSS 4.3 Dossier →
CVE-2026-0997 MEDIUM
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 and Mattermost Plugin Zoom versions <=1.11.0 fail to validate the authentic...

📅 2026-02-16
CVSS 4.3 Dossier →
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to validate user permissions when creating Jira issues from Mattermost...

📅 2026-02-13
CVSS 4.3 Dossier →
Component: mattermost_server

Mattermost versions 10.11.x <= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to l...

📅 2026-02-13
CVSS 3.1 Dossier →
Component: confluence

Mattermost Confluence plugin version <1.7.0 fails to properly escape user-controlled display names in HTML template rendering which allows authenticat...

📅 2026-02-06
CVSS 7.7 Dossier →
Component: mattermost_server

Mattermost versions 10.11.x <= 10.11.8, 11.1.x <= 11.1.1, 11.0.x <= 11.0.6 fail to prevent infinite re-renders on API errors which allows authenticate...

📅 2026-01-16
CVSS 6.8 Dossier →
Component: mattermost_server

Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU re...

📅 2026-01-16
CVSS 3.1 Dossier →
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-...

📅 2025-12-24
CVSS 4.1 Dossier →
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fails to validate user channel membership when attachin...

📅 2025-12-24
CVSS 4.3 Dossier →
Component: mattermost_server

Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 with the Jira plugin enabled and Mattermost Jira plugin...

📅 2025-12-22
CVSS 7.2 Dossier →
Component: mattermost_desktop

Mattermost Desktop App versions <6.0.0 fail to enable the Hardened Runtime on the Mattermost Desktop App when packaged for Mac App Store which allows ...

📅 2025-12-17
CVSS 3.9 Dossier →
Component: mattermost_server

Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (ve...

📅 2025-12-17
CVSS 3.7 Dossier →
Page 5 of 26 (602 Total Records)