What’s Vulnerable › Vulnerabilities

CVE-2023-45363

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 23.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-09 · updated 2026-06-17
• Weakness: CWE-835

Description

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Affected products

• Debian Linux: 11.0, 12.0
• Wikimedia Foundation MediaWiki: before 1.35.12; from 1.36.0 before 1.39.5; 1.40.0 — fixed in 1.35.12, 1.39.5

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.35.12, 1.39.5. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
• https://phabricator.wikimedia.org/T333050
• https://www.debian.org/security/2023/dsa-5520
• https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
• https://phabricator.wikimedia.org/T333050
• https://www.debian.org/security/2023/dsa-5520

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