Authentication Bypass Vulnerability in Mattermost Confluence Plugin
CVE-2025-54478

7.2HIGH

Key Information:

Vendor

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

What is CVE-2025-54478?

The Mattermost Confluence Plugin version below 1.5.0 contains a vulnerability that fails to enforce proper user authentication. This oversight permits unauthenticated attackers to exploit the API, allowing them to modify channel subscriptions without any authorization. Such access can lead to unauthorized changes within the Mattermost instance, posing significant risks to its users and their 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-2025-54478 : Authentication Bypass Vulnerability in Mattermost Confluence Plugin