Multiple SQL injection vulnerabilities in OSClass before 2.3.5 allow remote attackers to execute arbitrary SQL commands via the sCategory parameter to index.php, which is not properly handled by the (1) osc_search_category_id function in oc-includes/osclass/helpers/hSearch.php and (2) findBySlug function oc-includes/osclass/model/Category.php.  NOTE: some of these details are obtained from third party information.