EGroupware vulnerabilities

eGroupware before 1.8.006.20140217 is vulnerable to PHP object injection attacks, allowing remote attackers to delete arbitrary files and possibly execute arbitrary code.

In egroupware version 26.0 and earlier, an authenticated administrator can achieve OS-level Remote Code Execution (RCE) by uploading a malicious eTemplate XML file (.xet) to the VFS /etemplates mount. The Widget::expand_name() method passes template widget attribute values directly into a PHP eval() call with only double-quote escaping applied - backtick characters are not escaped. In PHP, backticks inside a double-quoted eval() string execute shell commands, allowing an admin-level user to escalate from web application access to arbitrary OS command execution on the server.

A vulnerability in EGroupware allows an authenticated attacker to achieve Remote Code Execution (RCE) on the server. If self-registration is enabled, it may be exploitable without authentication. The issue stems from improper authorization checks combined with file write and arbitrary file read primitives.