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 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 v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.3 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://mattermost.com/security-updates	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:mattermost:confluence:*:*:*:*:*:mattermost:*:*

History

No history.

Information

Published : 2026-02-06 16:16

Updated : 2026-02-24 21:17

NVD link : CVE-2025-13523

Mitre link : CVE-2025-13523

CVE.ORG link : CVE-2025-13523

JSON object : View

Products Affected

mattermost

confluence

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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