An issue was discovered in the UnlinkedWikibase extension in MediaWiki before 1.39.6…
Priority LOW 28CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00473 41st percentileScored 2026-11-07
Fix Partial samwilson/unlinked-wikibase (Packagist): 1.42.0Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | samwilson/unlinked-wikibase (Packagist) | before 1.42.0 | 1.42.0 | Patch available | GHSA-wcx3-63mm-h8x6 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- samwilson/unlinked-wikibase (Packagist) Vendor— Affected before 1.42.0 Fixed in 1.42.0 Patch available GHSA-wcx3-63mm-h8x6
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* | before 1.39.6; 1.40.0 to before 1.40.2; 1.41.0 to before 1.41.1 | Vulnerable | mediawiki |
| cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:* | 40 | Vulnerable | Fedoraproject |
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* Versions before 1.39.6; 1.40.0 to before 1.40.2; 1.41.0 to before 1.41.1 Vulnerable ·mediawiki
- cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:* Versions 40 Vulnerable ·Fedoraproject
Remediation
- Fix · GHSA-wcx3-63mm-h8x6 samwilson/unlinked-wikibase (Packagist) Fixed in 1.42.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 3.11 | Affected | No fix planned: Out of support scope |
Timeline
- 2026-10-02 Threatist record created from CVE-2024-34500
- 2026-10-03 Alias added: GHSA-wcx3-63mm-h8x6
References
Advisory 3
Other 4
- https://github.com/github/advisory-database/pull/5310
- https://gerrit.wikimedia.org/r/mediawiki/extensions/UnlinkedWikibase.git
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY
- https://lists.fedoraproject.org/archives/list/[email protected]/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY
Sources
- CVE-2024-34500 · CVE Program
- CVE-2024-34500 · NVD
- FIRST EPSS
- GHSA-wcx3-63mm-h8x6 · GitHub Advisory Database · CC BY 4.0
- CVE-2024-34500 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences