The WP RSS Aggregator plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 4.23.5 via the RSS feed source in admin settings. This makes it possible for authenticated attackers, with administrator-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

The WP RSS Aggregator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the RSS feed source in all versions up to, and including, 4.23.4 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 unfiltered_html has been disabled.