Security Vulnerabilities
Mattermost versions <11 fail to enforce multi-factor authentication on WebSocket connections which allows unauthenticated users to access sensitive information via WebSocket events
CVSS Score
6.5
EPSS Score
0.001
Published
2025-11-14
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.
CVSS Score
5.4
EPSS Score
0.0
Published
2025-11-14
Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` endpoint
CVSS Score
4.3
EPSS Score
0.0
Published
2025-11-14
Out of bounds read in V8 in Google Chrome prior to 133.0.6943.141 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)
CVSS Score
4.3
EPSS Score
0.001
Published
2025-11-14
Inappropriate implementation in DevTools in Google Chrome prior to 136.0.7103.59 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
CVSS Score
5.4
EPSS Score
0.0
Published
2025-11-14
Inappropriate implementation in WebApp Installs in Google Chrome on Android prior to 134.0.6998.35 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)
CVSS Score
4.3
EPSS Score
0.001
Published
2025-11-14
Inappropriate implementation in Compositing in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)
CVSS Score
4.3
EPSS Score
0.001
Published
2025-11-14
Inappropriate implementation in Dawn in Google Chrome on Mac prior to 130.0.6723.92 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)
CVSS Score
4.3
EPSS Score
0.001
Published
2025-11-14
Inappropriate implementation in Fullscreen in Google Chrome prior to 128.0.6613.84 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)
CVSS Score
4.3
EPSS Score
0.001
Published
2025-11-14
Inappropriate implementation in Lens in Google Chrome on iOS prior to 136.0.7103.59 allowed a remote attacker to perform UI spoofing via a crafted QR code. (Chromium security severity: Low)
CVSS Score
6.3
EPSS Score
0.001
Published
2025-11-14