Ubuntu: 12.04.04LTS updated ISPConfig: 3.0.5.4p1 WordPress: 3.9.1 Anyway here is how to fix it : nano /etc/apache2/mods-available/fcgid.conf and add there (below FcgidConnectTimeout): MaxRequestLen 15728640 So now there it set request limit to 15 MB Btw. the fcgid.conf file should after this modification look like this: AddHandler fcgid-script .fcgi FcgidConnectTimeout 20 MaxRequestLen 15728640 Source: http://www.hackerway.ch/2012/11/17/how-to-fix-wordpress-running-at-ispconfig-3-giving-error-500-internal-server-error/
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