Request Body Handling Flaw in Mattermost Confluence Plugin
CVE-2025-54525

7.5HIGH

Key Information:

Vendor

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

What is CVE-2025-54525?

The Mattermost Confluence Plugin, specifically versions prior to 1.5.0, contains a flaw in its handling of unexpected request bodies. This vulnerability allows attackers to repeatedly target the channel subscription endpoint with malformed requests, ultimately leading to a crash of the plugin. Such exploitation can undermine the operating stability of the system, impacting user access and overall functionality.

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:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Lorenzo Gallegos
.
CVE-2025-54525 : Request Body Handling Flaw in Mattermost Confluence Plugin