XSS in Malvineous Masseditregex
CVE-2025-53500
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - MassEditRegex Extension allows Stored XSS.This issue affects Mediawiki - MassEditRegex Extension: from 1.39.X before 1.39.12, 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 (15.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Malvineous Masseditregex
- Mediawiki
- Wikimedia Foundation Mediawiki - Masseditregex Extension — versions 1.39.x, 1.42.x, 1.43.x
Weakness classification (CWE)
Public proof-of-concept exploits
References
- c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Exploit, Patch, Issue Tracking)
- c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Patch)
Frequently asked questions
- What is CVE-2025-53500?
- CVE-2025-53500 is a medium-severity vulnerability in Malvineous Masseditregex, classified under Cross-site Scripting. CVSS score: 5.6/10. Published 2025-07-03.
- How severe is CVE-2025-53500?
- Medium severity. CVSS v3 base score is 5.6 out of 10.
- Is CVE-2025-53500 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.