Permitted File Extensions

JCE - A Content Editor for Joomla!®

7 - How to allow for files of any extension to be uploaded? - Drupal Answers

Add commas between allowed file extensions - Drupal Answers

Forbidden File Format

Plupload: List of allowed file-types are never set because plupload_element_pre_render is never called [#1859894]

How to Fix the Sorry, This File Type Is Not Permitted for Security Reasons Error in WordPress

How can I control the types and sizes of files that members can upload? - User Documentation - Verint Community 11.x - Verint

Allowed File Types :: Legacy Documentation

How to Fix Sorry, this file type is not permitted for security reasons

Wordpress file type not permitted for security reasons

How to Fix “Sorry, This File Type Is Not Permitted for Security Reasons” Error » Rank Math