XSS in Wikimedia Foundation Mediawiki - Wikicategorytagcloud Extension
CVE-2025-53486
The WikiCategoryTagCloud extension is vulnerable to reflected XSS via the linkstyle attribute, which is improperly concatenated into inline HTML without escaping. An attacker can inject JavaScript event handlers such as onmouseenter using…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (15.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Wikimedia Foundation Mediawiki - Wikicategorytagcloud Extension — versions 1.39.x, 1.42.x, 1.43.x
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-53486?
- CVE-2025-53486 is a medium-severity vulnerability in Wikimedia Foundation Mediawiki - Wikicategorytagcloud Extension, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-07-07.
- How severe is CVE-2025-53486?
- Medium severity. CVSS v3 base score is 5.4 out of 10.