CVE-2026-0671: Wikimedia Mediawiki-Extensions-Uploadwizard

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

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

Affected products

• Wikimedia Mediawiki-Extensions-Uploadwizard: version 1.39 only; version 1.43 only; version 1.44 only; version 1.45 only

Published 2026-01-08. Last modified 2026-06-17.