An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6…
Priority HIGH 82CWE-444Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- 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.
Summary
An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6, and 1.39.x before 1.39.3. An auto-block can occur for an untrusted X-Forwarded-For header.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01194 68th percentileScored 2026-11-07
Fix Partial mediawiki/core (Packagist): 1.39.3, 1.38.6, 1.35.10Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
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 |
| — | mediawiki/core (Packagist) | 1.39.0 to before 1.39.3 | 1.39.3 | Patch available | GHSA-5vj8-g3qg-4qh6 |
| — | mediawiki/core (Packagist) | 1.38.0 to before 1.38.6 | 1.38.6 | Patch available | GHSA-5vj8-g3qg-4qh6 |
| — | mediawiki/core (Packagist) | before 1.35.10 | 1.35.10 | Patch available | GHSA-5vj8-g3qg-4qh6 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- mediawiki/core (Packagist) Vendor— Affected 1.39.0 to before 1.39.3 Fixed in 1.39.3 Patch available GHSA-5vj8-g3qg-4qh6
- mediawiki/core (Packagist) Vendor— Affected 1.38.0 to before 1.38.6 Fixed in 1.38.6 Patch available GHSA-5vj8-g3qg-4qh6
- mediawiki/core (Packagist) Vendor— Affected before 1.35.10 Fixed in 1.35.10 Patch available GHSA-5vj8-g3qg-4qh6
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* | before 1.35.10; 1.36.0 to before 1.38.6; 1.39.0 to before 1.39.3 | Vulnerable | mediawiki |
| cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* | 37 | Vulnerable | Fedoraproject |
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* Versions before 1.35.10; 1.36.0 to before 1.38.6; 1.39.0 to before 1.39.3 Vulnerable ·mediawiki
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
Remediation
- Fix · GHSA-5vj8-g3qg-4qh6 mediawiki/core (Packagist) Fixed in 1.39.3 Advisory →
- Fix · GHSA-5vj8-g3qg-4qh6 mediawiki/core (Packagist) Fixed in 1.38.6 Advisory →
- Fix · GHSA-5vj8-g3qg-4qh6 mediawiki/core (Packagist) Fixed in 1.35.10 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Low. 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-2023-29141
- 2026-10-03 Alias added: GHSA-5vj8-g3qg-4qh6
References
Advisory 4
Other 9
- https://phabricator.wikimedia.org/T285159
- https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_39/RELEASE-NOTES-1.39
- [debian-lts-announce] 20230822 [SECURITY] [DLA 3540-1] mediawiki security update
- https://github.com/wikimedia/mediawiki
- https://lists.fedoraproject.org/archives/list/[email protected]/message/ONWHGOBFD6CQAEGOP5O375XAP2N6RUHT
- https://lists.fedoraproject.org/archives/list/[email protected]/message/ZGK4NZPIJ5ET2ANRZOUYPCRIB5I64JR7
- https://www.mediawiki.org/wiki/Release_notes/1.35#MediaWiki_1.35.10
- https://www.mediawiki.org/wiki/Release_notes/1.38#MediaWiki_1.38.6
- https://www.mediawiki.org/wiki/Release_notes/1.39#MediaWiki_1.39.3
Sources
- CVE-2023-29141 · CVE Program
- CVE-2023-29141 · NVD
- FIRST EPSS
- GHSA-5vj8-g3qg-4qh6 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-29141 · Red Hat security data · CC BY 4.0
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