CVE-2026-0671: Multiple stored i18n/message-key XSSes in UploadWizard

Published Jan 8, 2026
·
Updated

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 Software

5 affected components
Wikimedia Foundation Mediawiki - UploadWizard Extension>=1.39<1.46
Wikimedia Mediawiki-extensions-uploadwizard=1.39
Wikimedia Mediawiki-extensions-uploadwizard=1.43
Wikimedia Mediawiki-extensions-uploadwizard=1.44
Wikimedia Mediawiki-extensions-uploadwizard=1.45

Event History

Jan 8, 2026
CVE Published
via MITRE·04:21 PM
Data Sourced
via MITRE·04:21 PM
DescriptionWeakness
Data Sourced
via NVD·05:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Oct 20, 58013
Event
via FIRST·03:51 PM
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Frequently Asked Questions

1

What is the severity of CVE-2026-0671?

CVE-2026-0671 has been classified as a significant security vulnerability due to its potential for Cross-Site Scripting (XSS).

2

How do I fix CVE-2026-0671?

To mitigate CVE-2026-0671, update the MediaWiki - UploadWizard extension to version 1.46 or later, which contains the necessary patches.

3

Which versions are affected by CVE-2026-0671?

CVE-2026-0671 affects MediaWiki - UploadWizard extension versions 1.39 through 1.45 inclusively.

4

What type of vulnerability is CVE-2026-0671?

CVE-2026-0671 is classified as an Improper Neutralization of Input During Web Page Generation vulnerability, specifically related to Cross-Site Scripting (XSS).

5

Who is impacted by CVE-2026-0671?

Users of the MediaWiki - UploadWizard extension in the affected versions are at risk of exploitation through Cross-Site Scripting attacks.

Contact

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