Improper Check for Unusual or Exceptional Conditions
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. A "title" blocked by AbuseFilter can be created via "Special:ChangeContentModel" due to the mishandling of the "EditFilterMergedContent" hook return value.
CWE-754 - Improper Check for Unusual or Exceptional Conditions
The software does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the software.