High severityNVD Advisory· Published Feb 6, 2026· Updated Feb 6, 2026
Cross-Site Scripting (XSS) via Unescaped Display Names in Mattermost Confluence Plugin OAuth2 Flow
CVE-2025-13523
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost-plugin-confluenceGo | < 1.7.0 | 1.7.0 |
Affected products
3- ghsa-coords2 versionspkg:golang/github.com/mattermost/mattermost-plugin-confluencepkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6
< 1.7.0+ 1 more
- (no CPE)range: < 1.7.0
- (no CPE)range: < 0.0.20260226T182644-150000.1.149.1
- Range: 0
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-ffx7-34p2-vm3wghsaADVISORY
- mattermost.com/security-updatesghsavendor-advisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2025-13523ghsaADVISORY
News mentions
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