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
References
History

Tue, 24 Feb 2026 21:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mattermost:confluence:*:*:*:*:*:mattermost:*:*

Mon, 09 Feb 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost confluence
Vendors & Products Mattermost
Mattermost confluence

Fri, 06 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 06 Feb 2026 16:00:00 +0000

Type Values Removed Values Added
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
Title Cross-Site Scripting (XSS) via Unescaped Display Names in Mattermost Confluence Plugin OAuth2 Flow
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2026-02-06T16:23:06.496Z

Reserved: 2025-11-21T19:29:16.051Z

Link: CVE-2025-13523

cve-icon Vulnrichment

Updated: 2026-02-06T16:22:51.348Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-06T16:16:13.370

Modified: 2026-02-24T21:17:01.753

Link: CVE-2025-13523

cve-icon Redhat

No data.