This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.
This signature detects attempts of leveraging a command injection vulnerability in PhpWiki Ploticus module which could lead to system compromise.
PhpWiki is a WikiWikiWeb clone in PHP.
PhpWiki is prone to a remote command-injection vulnerability because it fails to properly sanitize user-supplied input. Specifically, this issue occurs in the Ploticus module.
An attacker may exploit this issue to execute arbitrary commands in context of the affected application.