Version 3 supports the **exec** action, but it is only supporting Lua script. As per the manual state, the exec action should also support other kinds of scripts or elfs. The manual entry that describes the exec action: [ModSecurity Reference Manual#exec](https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual-%28v2.x%29#exec) Here we can find the current code for the exec action on v3 - https://github.com/SpiderLabs/ModSecurity/blob/d5b93c1013ca9c9a96c75369576b54832e9a2b48/src/actions/exec.cc#L1-L10