Quote:Whenever any user attempts to add an apostrophe (') or quotation mark (") to their signature it bounces back this error message and links to mydomain/usercp.php

Why is this happening and how do I fix this?


Forbidden
You don't have permission to access /usercp.php on this server.
Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.

Quote:This issue can be caused ModSecurity, which is an Apache module that works as a web application firewall. It blocks known exploits and provides protection from a range of attacks against web applications.

Sometimes its rules can be triggered in a false positive by plugins or theme scripts. In your case, there were a few rules triggered, but not necessarily the same rules will be triggered for someone else.

Thus, we have to to test it on a case-by-case basis in order to determine which rules need to be whitelisted for each client. For your forums, we could do that once you tried an action and the logs told us exactly which rules were being triggered.