Phoca Cart 5.2.4, 6.1.7 and 4.0.13 fix a front-end SQL injection

Phoca Cart 5.2.4, 6.1.7 and 4.0.13 patch an unauthenticated SQL injection in the Joomla extension's product filter. Joomla 5 sites running Phoca Cart 6.x are not offered it.