JiZhiCMS addcache.html htmlspecialchars_decode sql injection

A vulnerability was detected in JiZhiCMS up to 2.5.6. The impacted element is the function htmlspecialchars_decode of the file /index.php/admins/Sys/addcache.html. The manipulation of the argument sqls results in sql injection. It is possible to launch the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.