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

Source: https://junglewise.ai/threats/cve-2026-0671-improper-neutralization-of-input-during-web-page-generation-xss-or  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-08  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/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