Authorization Flaw in Mattermost Confluence Plugin Affects User Access
CVE-2025-44004

7.2HIGH

Key Information:

Vendor

Mattermost
Status
Mattermost Confluence Plugin
Vendor
CVE Published:
11 August 2025

What is CVE-2025-44004?

The Mattermost Confluence Plugin prior to version 1.5.0 contains an authorization bypass vulnerability that permits attackers to exploit the API endpoint responsible for creating channel subscriptions. This flaw allows unauthorized users to gain access to functionalities typically restricted to authenticated users, posing a significant risk to user privacy and data integrity.

Affected Version(s)

Mattermost Confluence Plugin 0 < 1.5.0

Mattermost Confluence Plugin 1.5.0

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Lorenzo Gallegos
.
CVE-2025-44004 : Authorization Flaw in Mattermost Confluence Plugin Affects User Access