We received notification from the Zen Cart Development Team that there existed a potential admin privilege escalation issue whereby logged-in admin users of v1.5.0-to-v1.5.5 (before v1.5.5a) could change their own user profile permissions if they engaged in some hackery.

This only poses a risk when multiple admin users exist AND some have been assigned a profile restricting their privileges to disallow access to certain admin sections ... AND they have some malicious desire to gain access to changing settings or viewing data against which they've been restricted.

The fix involves replacing one file.