Permitted File Extensions

JCE - A Content Editor for Joomla!®

asp.net - What file extensions are blocked by default in IIS - Stack Overflow

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

Issue - Wordpress won't upload fonts files (Sorry, this file type is not permitted for security reasons.)

JCE: Adding Permitted File Type Profiles

Editing JCE acceptable file settings - YellowWebMonkey Web Design

File Type Is Not Permitted: How to Fix This WordPress Error • GigaPress

Sorry, This File Type Is Not Permitted For Security Reasons - FIXED

Fixed] Sorry, This File Type Is Not Permitted For Security Reasons

Allowed File Types of Wordpress File Upload Plugin - Iptanus

How Allow to Upload Forbidden File Types in WordPress

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

Add commas between allowed file extensions - Drupal Answers