Vulnerability in Mattermost Confluence
CVE-2025-53514
Mattermost Confluence Plugin version <1.5.0 fails to handle unexpected request body which allows attackers to crash the plugin via constant hit to server webhook endpoint with an invalid request body.
EPSS: 0.003 (17.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Mattermost Confluence
- Mattermost Confluence Plugin — versions 0, 1.5.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- responsibledisclosure@mattermost.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-53514?
- CVE-2025-53514 is a medium-severity vulnerability in Mattermost Confluence, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 5.9/10. Published 2025-08-11.
- How severe is CVE-2025-53514?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2025-53514 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.