Description
The Ultimate Member plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 2.5.0 via the populate_dropdown_options function that accepts user supplied input and passes it through call_user_func(). This is restricted to non-parameter PHP functions like phpinfo(); since user supplied parameters are not passed through the function. This makes it possible for authenticated attackers, with administrative privileges, to execute code on the server.
Remediation
References
Related Vulnerabilities
Moodle Improper Input Validation Vulnerability (CVE-2019-3847)
SharePoint Download of Code Without Integrity Check Vulnerability (CVE-2020-1210)
Sqlite NULL Pointer Dereference Vulnerability (CVE-2017-15286)
WordPress Plugin Gallery-Video Gallery and Youtube Gallery Cross-Site Scripting (1.7.01)
WordPress Plugin Wunderbar Basic Cross-Site Scripting (1.1.3)