CVE-2025-13523
Severity
5.4MEDIUM
EPSS
0.0%
top 98.11%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedFeb 6
Latest updateFeb 17
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 vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:NExploitability: 1.3 | Impact: 5.8
Affected Packages3 packages
🔴Vulnerability Details
4OSV▶
Mattermost Confluence plugin doesn't properly escape user-controlled display names in HTML template rendering in github.com/mattermost/mattermost-plugin-confluence↗2026-02-17
GHSA▶
Mattermost Confluence plugin doesn't properly escape user-controlled display names in HTML template rendering↗2026-02-06
OSV▶
Mattermost Confluence plugin doesn't properly escape user-controlled display names in HTML template rendering↗2026-02-06
CVEList▶
Cross-Site Scripting (XSS) via Unescaped Display Names in Mattermost Confluence Plugin OAuth2 Flow↗2026-02-06