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CVE-2025-61638

NonePublished

Sanitizer::validateAttributes data-XSS

Published: Feb 2, 2026
Updated: Feb 3, 2026
Assigning CNA: wikimedia-foundation
Evidence observed: Aug 7, 2026

Primary CVSS

0.0/ 10None

nvd · CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS probability estimate

0.2%

Low · next 30 days

Percentile: 16.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation Parsoid. This vulnerability is associated with program files includes/parser/Sanitizer.Php, src/Core/Sanitizer.Php. This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Sources

CVE-2025-61638PoC
Proof-of-concept exploit for CVE-2025-61638, a stored XSS vulnerability in MediaWiki's Sanitizer::validateAttributes. Tests for the flaw across vulnerable wiki instances via API.

Responsible use

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