ThinkPHP Framework before 6.0.14 allows local file inclusion via the lang parameter when the language pack feature is enabled (lang_switch_on=true). An unauthenticated and remote attacker can exploit this to execute arbitrary operating system commands, as demonstrated by including pearcmd.php.
The package topthink/framework before 6.0.12 are vulnerable to Deserialization of Untrusted Data due to insecure unserialize method in the Driver class.
ThinkPHP 5.1.25 has SQL Injection via the count parameter because the library/think/db/Query.php aggregate function mishandles the aggregate variable. NOTE: a backquote character is required in the attack URI.