CVE-2026-0670: Stored XSS through a system message and a user-provided parameter in ProofreadPage

Published Jan 7, 2026
·
Updated

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki - ProofreadPage Extension: 1.45, 1.44, 1.43, 1.39.

Affected Software

5 affected components
Wikimedia Foundation MediaWiki - ProofreadPage Extension>=1.39<1.45
Wikisource Proofread Page Mediawiki=1.39
Wikisource Proofread Page Mediawiki=1.43
Wikisource Proofread Page Mediawiki=1.44
Wikisource Proofread Page Mediawiki=1.45

Remediation

Patch Available

https://gerrit.wikimedia.org/r/q/I7c028db5ed81843aacd596b0ee4dc2980f5b6e3c

Event History

Jan 7, 2026
CVE Published
via MITRE·06:55 PM
Data Sourced
via MITRE·06:55 PM
DescriptionWeakness
Data Sourced
via NVD·07:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-0670?

CVE-2026-0670 has a high severity rating due to its potential for Cross-Site Scripting (XSS) attacks.

2

How do I fix CVE-2026-0670?

To fix CVE-2026-0670, update the MediaWiki - ProofreadPage Extension to version 1.46 or later.

3

Which versions are affected by CVE-2026-0670?

CVE-2026-0670 affects MediaWiki - ProofreadPage Extension versions 1.39 to 1.45.

4

What type of vulnerability is CVE-2026-0670?

CVE-2026-0670 is classified as an Improper Neutralization of Input During Web Page Generation vulnerability, specifically XSS.

5

What systems are vulnerable to CVE-2026-0670?

Systems using the affected versions of the MediaWiki - ProofreadPage Extension are vulnerable to CVE-2026-0670.

Company

Resources

Contact

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