Moodle KSES HTML Filter Bypass

Application: Moodle
Affected Version: prior to 1.8.5.
Vendor’s URL: Moodle KSES
Bug Type: Security Bypass
Risk Level: Medium

Solution:
Update to version 1.8.5 or upgrade to version 1.9.

The vendor recommends to use the option “Use HTML Purifier” in version 1.9.