Improper Privilege Management vulnerability in azzaroco Ultimate Membership Pro allows Privilege Escalation.This issue affects Ultimate Membership Pro: from n/a through 12.6.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in azzaroco Ultimate Membership Pro allows Reflected XSS.This issue affects Ultimate Membership Pro: from n/a through 12.6.

The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Skype and Spotify URL parameters in all versions up to, and including, 2.8.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to SQL Injection via the 'sorting' parameter in versions 2.1.3 to 2.8.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

The Restrict User Access – Ultimate Membership & Content Protection plugin for WordPress is vulnerable to Information Exposure in all versions up to, and including, 2.5 via API. This makes it possible for unauthenticated attackers to obtain the contents of posts and pages via API.

The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the several parameters in all versions up to, and including, 2.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Cross-Site Request Forgery (CSRF) vulnerability in Ultimate Member plugin <= 2.6.0 versions.

The Ultimate Member WordPress plugin before 2.6.7 does not prevent visitors from creating user accounts with arbitrary capabilities, effectively allowing attackers to create administrator accounts at will. This is actively being exploited in the wild.

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.

The Ultimate Member plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 2.5.0 via the get_option_value_from_callback function that accepts user supplied input and passes it through call_user_func(). This makes it possible for authenticated attackers, with administrative capabilities, to execute code on the server.