Exponent CMS 2.4.1 and earlier has SQL injection via a base64 serialized API key (apikey parameter) in the api function of framework/modules/eaas/controllers/eaasController.php.
https://packetstormsecurity.com/files/142258/Exponent-CMS-2.4.1-SQL-Injection.html
https://github.com/exponentcms/exponent-cms/commit/67a9c2f0229de120431f3eecb0f5017075517105
https://gist.github.com/404notf0und/ab59234d71fbf35b4926ffd646324f29