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CVE-2024-34500

MEDIUM
6.1
CVSS Score
Published: May 5, 2024 at 12:00 AM UTC
Updated: June 17, 2026 at 07:33 AM UTC
2 products affected across 2 vendorsFedoraMediaWiki

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
40
MediaWiki· Mediawiki
95%
v < 1.39.61.40.0 ≤ v < 1.40.21.41.0 ≤ v < 1.41.1
Affected range stops below 1.39.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.40.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.41.1, so it looks safe — our inference, not a vendor statement

References (4)

PatchVendor Advisory
Source: [email protected]
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/UnlinkedWikibase/+/1002175
Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
Issue TrackingVendor Advisory
Source: [email protected]
https://phabricator.wikimedia.org/T357203
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/[email protected]/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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