Vulnerability in Mattermost Confluence
CVE-2025-52931
Mattermost Confluence Plugin version <1.5.0 fails to handle unexpected request body which allows attackers to crash the plugin via constant hit to update channel subscription endpoint with an invalid request body.
EPSS: 0.003 (22.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/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-2025-52931?
- CVE-2025-52931 is a high-severity vulnerability in Mattermost Confluence, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2025-08-11.
- How severe is CVE-2025-52931?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-52931 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.