mattermost Vulnerability Advisory Catalog

Total 602 security vulnerabilities recorded for mattermost software and firmware.

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CVE-2026-3113 MEDIUM
Component: mattermost_server

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to set permissions on downloaded bulk export which ...

📅 2026-03-26
CVSS 5.0 Dossier →
CVE-2026-3112 MEDIUM
Component: mattermost_server

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to validate Advanced Logging file target paths whic...

📅 2026-03-26
CVSS 6.8 Dossier →
Component: mattermost_server

Mattermost Plugins versions <=11.4 10.11.11.0 fail to validate webhook request timestamps which allows an attacker to corrupt Zoom meeting state in Ma...

📅 2026-03-26
CVSS 2.2 Dossier →
Component: mattermost_server

Mattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to sanitize user-controlled post content in the mmc...

📅 2026-03-26
CVSS 8.0 Dossier →
CVE-2026-4274 MEDIUM
Component: mattermost_server

Mattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to restrict team-level access when processing membe...

📅 2026-03-26
CVSS 5.4 Dossier →
Component: mattermost_server

Mattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to properly validate CSRF tokens in the /api/v4/acc...

📅 2026-03-25
CVSS 4.6 Dossier →
Component: mattermost_server

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to properly validate user identity in the OpenID {{...

📅 2026-03-25
CVSS 5.7 Dossier →
Component: mattermost_server

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to rate limit login requests which allows unauthent...

📅 2026-03-25
CVSS 4.3 Dossier →
Component: mattermost_server

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to prevent rendering of external SVGs on link embed...

📅 2026-03-25
CVSS 4.3 Dossier →
CVE-2026-2454 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 handle incorrectly reported array lengths which allows malicious u...

📅 2026-03-16
CVSS 5.8 Dossier →
Component: mattermost_server

Mattermost versions 10.11.x <= 10.11.10 fail to properly validate permission requirements in the team member roles API endpoint which allows team admi...

📅 2026-03-16
CVSS 3.8 Dossier →
CVE-2026-1629 MEDIUM
Component: mattermost_server

Mattermost versions 10.11.x <= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to con...

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

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2 fail to verify run_create permission for empty playbookId, which allows team members to create ...

📅 2026-03-16
CVSS 4.3 Dossier →
CVE-2026-2455 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 canonicalize IPv4-mapped IPv6 addresses before reserved IP validat...

📅 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 enforce read permissions in search API endpoints which al...

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

Mattermost versions 10.11.x <= 10.11.10 fail to validate user's authentication method when processing account auth type switch which allows an authent...

📅 2026-03-16
CVSS 3.1 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 use consistent error responses when handling the /mute command whi...

📅 2026-03-16
CVSS 4.3 Dossier →
CVE-2026-4265 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 validate team-specific upload_file permissions which allows a gues...

📅 2026-03-16
CVSS 4.3 Dossier →
CVE-2026-2578 MEDIUM
Component: mattermost_server

Mattermost versions 11.3.x <= 11.3.0 fail to preserve the redacted state of burn-on-read posts during deletion which allows channel members to access ...

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

Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to ...

📅 2026-03-16
CVSS 7.6 Dossier →
CVE-2026-2463 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 filter invite IDs based on user permissions, which allows regular ...

📅 2026-03-16
CVSS 4.3 Dossier →
CVE-2026-2462 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 restrict plugin installation on CI test instances with default adm...

📅 2026-03-16
CVSS 6.6 Dossier →
CVE-2026-2461 MEDIUM
Component: mattermost_server

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 aut...

📅 2026-03-16
CVSS 4.3 Dossier →
CVE-2026-2458 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 properly validate team membership when searching channels which al...

📅 2026-03-16
CVSS 4.3 Dossier →
Page 4 of 26 (602 Total Records)