Is CVE-2026-0671 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-0671 being exploited in the wild.

How severe is CVE-2026-0671?

Medium severity, with a CVSS score of 6.1, published 8 January 2026.

Which products and versions are affected?

Wikimedia Mediawiki-Extensions-Uploadwizard. The advisory does not name versions.

Is there a fix for CVE-2026-0671?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Am I affected by CVE-2026-0671?

Check whether you run Wikimedia Mediawiki-Extensions-Uploadwizard. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-0671: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia…

CVE-2026-0671 · Severity: medium · CVSS 6.1 · Published 2026-01-08

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.

Vendors: Wikimedia.

Quick answers

Is CVE-2026-0671 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-0671 being exploited in the wild.
How severe is CVE-2026-0671?: Medium severity, with a CVSS score of 6.1, published 8 January 2026.
Which products and versions are affected?: Wikimedia Mediawiki-Extensions-Uploadwizard. The advisory does not name versions.
Is there a fix for CVE-2026-0671?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-0671?: Check whether you run Wikimedia Mediawiki-Extensions-Uploadwizard. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

Wikimedia Mediawiki-Extensions-Uploadwizard

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.