CVE-2023-45367

CVSS 3.1 Score 6.5 of 10 (medium)

Details

Published Oct 9, 2023
Updated: Oct 12, 2023

Summary

CVE-2023-45367 is a vulnerability affecting the CheckUser extension in MediaWiki versions before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. This issue allows a user to store an excessive number of rows in the cu_useragent_clienthints table through a rest.php/checkuser/v0/useragent-clienthints/revision/ URL. The result is a denial of service for the affected MediaWiki instance. By exploiting this vulnerability, an attacker can cause the database to become overwhelmed, leading to a degraded user experience or even a complete system crash. This issue underscores the importance of keeping MediaWiki installations up to date to protect against known vulnerabilities.

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