CVE-2024-34500

Name: CVE-2024-34500
Creator: NVD / NIST
Published: 2024-05-05T19:15:07.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2024-34500 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. An issue was discovered in the UnlinkedWikibase extension in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1. XSS can occur through an interface message. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

An issue was discovered in the UnlinkedWikibase extension in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1. XSS can occur through an interface message. Error messages (in the $err var) are not escaped before being passed to Html::rawElement() in the getError() function in the Hooks class.

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

0.47%

37.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mediawiki	Mediawiki	< 1.39.6
Mediawiki	Mediawiki	>= 1.40.0, < 1.40.2
Mediawiki	Mediawiki	>= 1.41.0, < 1.41.1
Fedoraproject	Fedora	40

References

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/UnlinkedWikibase/+/1002175Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/Third Party Advisory
https://phabricator.wikimedia.org/T357203Issue Tracking, Vendor Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/UnlinkedWikibase/+/1002175Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
https://phabricator.wikimedia.org/T357203Issue Tracking, Vendor Advisory

Timeline

Published: May 5, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-34500?

How severe is CVE-2024-34500?

CVE-2024-34500 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2024-34500?

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-2024-34500?

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

Scan your code now

Source: NVD / NIST