The Ultimate Classified Listings plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 1.6 via the 'uclwpdashboard' shortcode. This makes it possible for authenticated attackers, with Contributor-level access and above, to include and execute arbitrary .php files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where .php file types can be uploaded and included.

The Ultimate Classified Listings plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the savecustomfields function in all versions up to, and including, 1.7. This makes it possible for authenticated attackers, with Subscriber-level access and above, to change plugin custom fields.

The Ultimate Classified Listings plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.5. This is due to missing or incorrect nonce validation on the updateprofile function. This makes it possible for unauthenticated attackers to modify victim's email via a forged request, which might lead to account takeover, granted they can trick a user into performing an action such as clicking on a link.

The Ultimate Classified Listings plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Title parameter in all versions up to, and including, 1.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfilteredhtml has been disabled.

The Ultimate Classified Listings WordPress plugin before 1.4 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

The Ultimate Classified Listings WordPress plugin before 1.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

The Ultimate Classified Listings WordPress plugin before 1.3 does not validate the uclpage and layout parameters allowing unauthenticated users to access PHP files on the server from the listings page