CVE-2026-0671

Name: CVE-2026-0671
Creator: NVD / NIST
Published: 2026-01-08T17:15:50.24+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2026-0671 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.20%

10.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Wikimedia	Mediawiki-Extensions-Uploadwizard	1.39
Wikimedia	Mediawiki-Extensions-Uploadwizard	1.43
Wikimedia	Mediawiki-Extensions-Uploadwizard	1.44
Wikimedia	Mediawiki-Extensions-Uploadwizard	1.45

References

https://gerrit.wikimedia.org/r/q/I16de2211594ea9a686868ad7789f9879bf981fa1Patch
https://phabricator.wikimedia.org/T407157Exploit, Issue Tracking, Vendor Advisory

Timeline

Published: Jan 8, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-0671?

How severe is CVE-2026-0671?

CVE-2026-0671 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-0671?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-0671?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST