CVE-2025-13523
7.7 · HIGHOverview
CVE-2025-13523 is a high-severity vulnerability affecting mattermost confluence. It was published on February 6, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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
Remediation
Check the references section for vendor advisories and patches from mattermost. Update confluence to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| mattermost | confluence | >= 1.0.0, < 1.7.0 | Affected |
References
Frequently Asked Questions
What is CVE-2025-13523?
CVE-2025-13523 is a high-severity vulnerability affecting mattermost confluence. It was published on February 6, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).
How severe is CVE-2025-13523?
This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-13523?
Check the references section for vendor advisories and patches from mattermost. Update confluence to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-13523?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-13523 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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