The database backup feature in upload/source/admincp/admincp_db.php in Discuz! 2.5 and 3.4 allows remote attackers to execute arbitrary PHP code.

An issue was discovered in DuomiCMS 3.0. Remote PHP code execution is possible via the search.php searchword parameter because "eval" is used during "if" processing.

An issue was discovered in DuomiCMS 3.0. SQL injection exists in the ajax.php file, as demonstrated by the uid parameter.

Discuz! DiscuzX 3.4, when WeChat login is enabled, allows remote attackers to bypass authentication by leveraging a non-empty #wechat#common_member_wechatmp to gain login access to an account via a plugin.php ac=wxregister request (the attacker does not have control over which account will be accessed).

Discuz! DiscuzX 3.4, when WeChat login is enabled, allows remote attackers to bypass a "disabled registration" setting by adding a non-existing wxopenid value to the plugin.php ac=wxregister query string.

Discuz! DiscuzX 3.4, when WeChat login is enabled, allows remote attackers to delete the common_member_wechatmp data structure via an ac=unbindmp request to plugin.php.