Unexpected Request Body Handling Flaw in Mattermost Confluence Plugin
CVE-2025-53514

5.9MEDIUM

Key Information:

Vendor

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

What is CVE-2025-53514?

The Mattermost Confluence Plugin prior to version 1.5.0 is susceptible to an improper input validation vulnerability. This flaw occurs when the plugin fails to effectively handle unexpected request bodies, allowing malicious actors to send a series of invalid requests. By continuously targeting the server's webhook endpoint, an attacker can induce crashes, leading to service interruptions and degraded functionality.

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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:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Lorenzo Gallegos
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