CVSS 3.1 Score 7.3 of 10 (high)


Published Sep 25, 2023
Updated: Feb 1, 2024


CVE-2023-3550 is a vulnerability affecting Mediawiki v1.40.0. This vulnerability occurs when the instance administrator allows XML file uploads without validating namespaces used in the XML files. As a result, a remote attacker with a low-privileged user account can exploit this vulnerability by sending a malicious link to the instance administrator, allowing them to become an administrator. The severity of this vulnerability is classified as high, with a base score of 7.3 according to CVSS:3.1. The potential danger it poses to an organization includes the compromise of integrity and confidentiality, with no impact on availability. To remediate this vulnerability, it is recommended to validate namespaces in XML files before allowing uploads and applying any available patches or updates provided by Mediawiki.


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