CVE-2023-45367

PoC —

CVSS 3.1

6.5 medium

EPSS

<1%p44

Published

Oct 9, 2023 (Oct 9, 2023)

Modified

Jun 17, 2026

Description

An issue was discovered in the CheckUser 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. A user can use a rest.php/checkuser/v0/useragent-clienthints/revision/ URL to store an arbitrary number of rows in cu_useragent_clienthints, leading to a denial of service.

Vendors: mediawiki
Products: mediawiki
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

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