XSS in Mediawiki
CVE-2025-53494
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TwoColConflict Extension allows Stored XSS.This issue affects Mediawiki - TwoColConflict Extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (14.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Mediawiki
- Wikimedia Foundation Mediawiki - Twocolconflict Extension — versions 1.39.x, 1.42.x, 1.43.x
- Wmde-fisch Twocolconflict
Weakness classification (CWE)
Public proof-of-concept exploits
References
- c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Exploit, Issue Tracking)
- c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Patch)
Frequently asked questions
- What is CVE-2025-53494?
- CVE-2025-53494 is a medium-severity vulnerability in Mediawiki, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2025-07-02.
- How severe is CVE-2025-53494?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-53494 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.