What is CVE-2026-0671?

CVE-2026-0671 is a medium-severity vulnerability in Wikimedia Mediawiki-Extensions-Uploadwizard, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-08.

How severe is CVE-2026-0671?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Wikimedia Mediawiki-Extensions-Uploadwizard

CVE-2026-0671

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (10.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Wikimedia Mediawiki-extensions-uploadwizard — versions 1.39, 1.43, 1.44
Wikimedia Foundation Mediawiki - Uploadwizard Extension — versions 1.45, 1.44, 1.43

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Exploit, Issue Tracking, Vendor Advisory)
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Patch)

Frequently asked questions

What is CVE-2026-0671?: CVE-2026-0671 is a medium-severity vulnerability in Wikimedia Mediawiki-Extensions-Uploadwizard, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-08.
How severe is CVE-2026-0671?: Medium severity. CVSS v3 base score is 6.1 out of 10.