What’s Vulnerable › Vulnerabilities
CVE-2023-22912
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2023-01-20 · updated 2026-06-17
- Weakness: CWE-330
Description
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.
Affected products
- Wikimedia Foundation MediaWiki: before 1.35.9; from 1.36.0 before 1.38.5; 1.39.0, 1.39.0-rc0, 1.39.0-rc1 — fixed in 1.35.9, 1.38.5
How to fix
Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.35.9, 1.38.5. Check the vendor advisory for mitigations.
References
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