CVSS Score of 10 (low)


Published Jun 30, 2023
Updated: Jul 7, 2023


CVE-2023-37303 is a vulnerability in the CheckUser extension for MediaWiki through version 1.39.3. The issue occurs when attempting to block a user, which may fail after a temporary browser hang and display a DBQueryDisconnectedError error message. This vulnerability affects multiple products, including Xz2hff, Xz2hfe, Xz2hf_, and more. To remediate the vulnerability, users are advised to update their MediaWiki installation to version 1.39.4 or later. The potential danger of this vulnerability is rated as critical, with a CVSS base score of 9.8 out of 10, indicating high impact on confidentiality, integrity, and availability of affected systems. No further analysis or information is available at this time.

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