An issue was discovered in the CheckUser extension for MediaWiki through 1.39.x.
Priority MEDIUM 63CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-200.
Summary
An issue was discovered in the CheckUser extension for MediaWiki through 1.39.x. Various components of this extension can expose information on the performer of edits and logged actions. This information should not allow public viewing: it is supposed to be viewable only by users with suppression rights.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00607 49th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Will not fix Red Hat: no fix planned
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- 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 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mediawiki:mediawiki:1.39.0:-:*:*:*:*:*:* | 1.39.0 | Vulnerable | mediawiki |
| cpe:2.3:a:mediawiki:mediawiki:1.39.0:rc0:*:*:*:*:*:* | 1.39.0 rc0 | Vulnerable | mediawiki |
| cpe:2.3:a:mediawiki:mediawiki:1.39.0:rc1:*:*:*:*:*:* | 1.39.0 rc1 | Vulnerable | mediawiki |
| cpe:2.3:a:mediawiki:mediawiki:1.39.1:*:*:*:*:*:*:* | 1.39.1 | Vulnerable | mediawiki |
- cpe:2.3:a:mediawiki:mediawiki:1.39.0:-:*:*:*:*:*:* Versions 1.39.0 Vulnerable ·mediawiki
- cpe:2.3:a:mediawiki:mediawiki:1.39.0:rc0:*:*:*:*:*:* Versions 1.39.0 rc0 Vulnerable ·mediawiki
- cpe:2.3:a:mediawiki:mediawiki:1.39.0:rc1:*:*:*:*:*:* Versions 1.39.0 rc1 Vulnerable ·mediawiki
- cpe:2.3:a:mediawiki:mediawiki:1.39.1:*:*:*:*:*:*:* Versions 1.39.1 Vulnerable ·mediawiki
Remediation
No fixed version listed by the sources yet.
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-2022-39193
- 2026-10-03 Alias added: GHSA-5jq2-gw2c-fg5h
References
More Mediawiki vulnerabilities
- TI-2023-18933 An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. CVSS 3.1CRITICAL 9.8
- TI-2023-13576 An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6… CVSS 3.1CRITICAL 9.8
- TI-2023-03312 Stored XSS leads to privilege escalation in MediaWiki v1.40.0 CVSS 3.1CRITICAL 9.0
- TI-2026-42109 Cross-site request forgery in Wikimedia Foundation Mediawiki - RedirectManager Extension CVSS 4.0MEDIUM 6.9
- TI-2024-22822 An issue was discovered in includes/CommentFormatter/CommentParser.php in MediaWiki… CVSS 3.1HIGH 7.4
- TI-2023-18935 An issue was discovered in the ProofreadPage (aka Proofread Page) extension for MediaWiki… CVSS 3.1MEDIUM 5.3
Sources
- CVE-2022-39193 · CVE Program
- CVE-2022-39193 · NVD
- FIRST EPSS
- GHSA-5jq2-gw2c-fg5h · GitHub Advisory Database · CC BY 4.0
- CVE-2022-39193 · 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