CVE-2023-3550: mediawiki: stored XSS leads to privilege escalation

Severity: Critical

CVSS Score: 9

Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.