PHP remote file inclusion vulnerability in tell_a_friend.inc.php for Tell A Friend Script 2.7 before 20050305 allows remote attackers to execute arbitrary PHP code by modifying the script_root parameter to reference a URL on a remote web server that contains the code. NOTE: it was later reported that 2.4 is also affected.
Improper Control of Generation of Code The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.