Multiple SQL injection vulnerabilities in oc-admin/ajax/ajax.php in OSClass before 2.3.5 allow remote attackers to execute arbitrary SQL commands via the id parameter in a (1) edit_category_post or (2) enable_category action to index.php.
https://github.com/osclass/OSClass/commit/ff7ef8a97301aaaf6a97fe46c2c27981a86b4e2f#diff-1
https://exchange.xforce.ibmcloud.com/vulnerabilities/78964
http://www.codseq.it/advisories/multiple_vulnerabilities_in_osclass