What’s Vulnerable › Vulnerabilities

CVE-2023-45372

• 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: none known
• Published: 2023-10-09 · updated 2026-06-17
• Weakness: CWE-693

Description

An issue was discovered in the Wikibase extension for MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. During item merging, ItemMergeInteractor does not have an edit filter running (e.g., AbuseFilter).

Affected products

• 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://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/961264
• https://phabricator.wikimedia.org/T345064
• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/961264
• https://phabricator.wikimedia.org/T345064

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