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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00047.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Wikimedia Foundation MediaWiki - ProofreadPage Extension unaffected
Version Status Constraints
1.45 affected
—
1.44 affected
—
1.43 affected
—
1.39 affected
—

Configuration 1 [-]

OR cpe:2.3:a:wikisource:proofread_page:1.39:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.43:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.44:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.45:*:*:*:*:mediawiki:*:*

No data.

Vendor Product Confidence Versions
Mediawiki Mediawiki — —
Wikimedia Mediawiki-proofreadpage Extension — —

Found an issue or want to improve our Enrichment? You can suggest it directly by opening an issue on our dedicated GitHub repository .

Subscriptions

Vendors Products
Mediawiki Subscribe
Mediawiki Subscribe
Wikimedia Subscribe
Mediawiki-proofreadpage Extension Subscribe
Wikisource Subscribe
Proofread Page Subscribe

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gerrit.wikimedia.org/r/q/I7c028db5ed81843aacd596b0ee4dc2980f5b6e3c cve-icon cve-icon
https://phabricator.wikimedia.org/T409423 cve-icon cve-icon
History

Mon, 23 Feb 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Wikisource
Wikisource proofread Page
CPEs cpe:2.3:a:wikisource:proofread_page:1.39:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.43:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.44:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.45:*:*:*:*:mediawiki:*:*
Vendors & Products Wikisource
Wikisource proofread Page

Thu, 08 Jan 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Mediawiki
Mediawiki mediawiki
Wikimedia
Wikimedia mediawiki-proofreadpage Extension
Vendors & Products Mediawiki
Mediawiki mediawiki
Wikimedia
Wikimedia mediawiki-proofreadpage Extension

Wed, 07 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 07 Jan 2026 19:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Stored XSS through a system message and a user-provided parameter in ProofreadPage
Weaknesses CWE-79
References
cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-01-07T19:25:36.796Z

Reserved: 2026-01-07T16:35:04.806Z

Link: CVE-2026-0670

cve-icon Vulnrichment

Updated: 2026-01-07T19:25:08.156Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-07T19:15:56.203

Modified: 2026-02-23T18:40:17.617

Link: CVE-2026-0670

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-08T09:48:23Z

Weaknesses