What is CVE-2025-13523?

CVE-2025-13523 is a high-severity vulnerability in Mattermost Confluence, classified under Cross-site Scripting. CVSS score: 7.7/10. Published 2026-02-06.

How severe is CVE-2025-13523?

High severity. CVSS v3 base score is 7.7 out of 10.

XSS in Mattermost Confluence

CVE-2025-13523

Mattermost Confluence plugin version <1.7.0 fails to properly escape user-controlled display names in HTML template rendering which allows authenticated Confluence users with malicious display names to execute arbitrary JavaScript in victi…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N.

Affected products

Mattermost Confluence
Mattermost Confluence Plugin — versions 0, 1.7.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

responsibledisclosure@mattermost.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-13523?: CVE-2025-13523 is a high-severity vulnerability in Mattermost Confluence, classified under Cross-site Scripting. CVSS score: 7.7/10. Published 2026-02-06.
How severe is CVE-2025-13523?: High severity. CVSS v3 base score is 7.7 out of 10.