In the module "Facebook" (pkfacebook) <=1.0.1 from Promokit.eu for PrestaShop, a guest can perform SQL injection. The ajax script facebookConnect.php have a sensitive SQL call that can be executed with a trivial http call and exploited to forge a SQL injection.
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.