An issue was discovered in MediaWiki before 1.35.9, 1.36.x through 1.38.x before 1.38.5…
Priority MEDIUM 63CWE-330Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
An issue was discovered in MediaWiki before 1.35.9, 1.36.x through 1.38.x before 1.38.5, and 1.39.x before 1.39.1. CheckUser TokenManager insecurely uses AES-CTR encryption with a repeated (aka re-used) nonce, allowing an adversary to decrypt.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00393 33rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
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:*:*:*:*:*:*:*:* | before 1.35.9; 1.36.0 to before 1.38.5 | Vulnerable | mediawiki |
| 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:*:*:*:*:*:*:*:* Versions before 1.35.9; 1.36.0 to before 1.38.5 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
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-22912
- 2026-10-03 Alias added: GHSA-x2pr-v49f-hmmm
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-2023-22912 · CVE Program
- CVE-2023-22912 · NVD
- FIRST EPSS
- GHSA-x2pr-v49f-hmmm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences