I have mod_security (apache2) installed on my server hosting Wordpress websites. When I attempt to install a plugin by uploading a .zip file from the disk it fails with 403 Forbidden and "Multipart parser detected a possible unmatched boundary" in the log. In my configuration this rule is defined in /etc/modsecurity/modsecurity.conf line 82, rule #200003. I've attempted to disable it in REQUEST-900-EXCLUSION-RULES-BEFORE-CRS.conf, but it isn't working.
Is it safe to disable it in /etc/modsecurity/modsecurity.conf? Why the rule exclusion isn't working?