application\admin\controller\User.php in ThinkAdmin V4.0 does not prevent continued use of an administrator's cookie-based credentials after a password change.

An insecure unserialize vulnerability was discovered in ThinkAdmin versions 4.x through 6.x in app/admin/controller/api/Update.php and app/wechat/controller/api/Push.php, which may lead to arbitrary remote code execution.

ThinkAdmin v6 is affected by a directory traversal vulnerability. An unauthorized attacker can read arbitrarily file on a remote server via GET request encode parameter.

ThinkAdmin version v1 v6 has a stored XSS vulnerability which allows remote attackers to inject an arbitrary web script or HTML.

ThinkAdmin v6 has default administrator credentials, which allows attackers to gain unrestricted administratior dashboard access.

An arbitrary file upload vulnerability in the component /api/upload.php of ThinkAdmin v6 allows attackers to execute arbitrary code via a crafted file.

An issue in the component /admin/api.plugs/script of ThinkAdmin v6.1.53 allows attackers to getshell via providing a crafted URL to download a malicious PHP file.

An arbitrary file upload vulnerability in the component /admin/api.upload/file of ThinkAdmin v6.1.53 allows attackers to execute arbitrary code via a crafted Zip file.

A vulnerability, which was classified as critical, was found in ThinkAdmin up to 6.1.67. Affected is the function script of the file /app/admin/controller/api/Plugs.php. The manipulation of the argument uptoken leads to deserialization. It is possible to launch the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.