source: https://www.securityfocus.com/bid/14927/info

phpMyFAQ is affected by an SQL injection vulnerability. This issue is due to the application failing to properly sanitize user-supplied input before using it in a SQL query.

This vulnerability could permit remote attackers to pass malicious input to database queries, resulting in modification of query logic or other attacks.

phpMyFAQ version 1.5.1 is reported prone to this vulnerability. 

switch to /admin directory, click on "forgotten password" feature
user: ' or isnull(1/0) /*
mail: [your_email]