Manual:$wgStrictFileExtensions

Files and file uploads: $wgStrictFileExtensions
Toggle whether users may upload files not covered by $wgFileExtensions .
Introduced in version:1.2.0
Removed in version:Still in use
Allowed values:(boolean)
Default value:true

Details

If set to true, users will only be able to upload files with specifically permitted extensions (see $wgFileExtensions ).

If set to false, users will be able to upload files with almost any extension. A user attempting to upload a file whose extension is not in $wgFileExtensions will receive a warning message. However, they may choose to ignore the message and upload the file anyway (assuming the file's extension is not in the $wgProhibitedFileExtensions ).

  Warning: Setting this to false is insecure for public wikis.

See also