CVE-2025-53514: mattermost confluence
CVSS: 5.9v3.1MediumAnalyzed
AliasesGHSA-w92j-c6gr-hj8rGO-2025-3871
Published 11-08-2025Last modified 11-08-2025
Vulnerability summary
CVE-2025-53514 is a medium (CVSS 5.9) vulnerability in mattermost confluence. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 19.8% of scored vulnerabilities.
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 11-08-2025PublishedVulnerability first disclosed.
- 11-08-2025Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 5.9Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · GoEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
0.00 pp
From 0.28% on 20-09-2026
20-09-202620-10-2026
EPSS score0.29%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Mattermost2 products
- confluence< 1.5.0
- mattermost confluence plugin< 1.5.0
Github.com/mattermost1 product
- mattermost-plugin-confluence< 1.5.0
2 vendors · 3 products
