Myucms v2.2.1 contains a server-side request forgery (SSRF) in the component controllerindex.php, which can be exploited via the sj() method.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21653
Reference (s):
- https://github.com/lolipop1234/XXD/issues/5