CVE-2025-55074

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects

Scoring

Severity

LOW

CVSS base score

3

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N

EPSS probability

0.17%

CWE

CWE-1426

Published

2025-11-18

Last modified

2026-03-12

Affected products

• Mattermost Mattermost
• Mattermost Mattermost
• Mattermost Mattermost
• Mattermost Mattermost
• Mattermost Mattermost

Weakness type

• CWE-1426

Related vulnerabilities

• CVE-2025-62453 — GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability
• CVE-2025-31363 — Data exfiltration via AI plugin Jira tool

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