Is CVE-2025-13523 actively exploited?

CVE-2025-13523 has no public evidence of in-the-wild exploitation as of 2026-02-24.

What is the CVSS score for CVE-2025-13523?

CVE-2025-13523 has a CVSS score of 7.7 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N.

How do I patch CVE-2025-13523?

Patch guidance is available from mattermost security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-13523.

Which products are affected by CVE-2025-13523?

1 product: mattermost confluence.

Fix CVE-2025-13523 - HIGH mattermost confluence

Description

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 victim browsers via sending a specially crafted OAuth2 connection link that, when visited, renders the attacker's display name without proper sanitization. Mattermost Advisory ID: MMSA-2025-00557

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Attack Vector: network
Complexity: high
Privileges: low
User Action: required
Scope: changed
Confidentiality: high
Integrity: high
Availability: none
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: MATTERMOST
Published: 2/6/2026
Last Modified: 2/24/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mattermost : confluence

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-13523. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2025-13523

View on NIST NVD

CVE-2025-13523 vulnerability