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CVE-2025-13767

Good to know:

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Date: December 24, 2025

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 attaching Mattermost posts as comments to Jira issues, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to.

Severity Score

Related Resources (3)

https://nvd.nist.gov/vuln/detail/CVE-2025-13767
https://mattermost.com/security-updates
https://www.mend.io/vulnerability-database/CVE-2025-13767

Severity Score

Weakness Type (CWE)

Incorrect Authorization

CWE-863

Top Fix

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Upgrade Version

Upgrade to version github.com/mattermost/mattermost - v10.11.8;github.com/mattermost/mattermost - v10.12.4;github.com/mattermost/mattermost - v11.0.6;github.com/mattermost/mattermost - v11.1.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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