The Broadstreet plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.53.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, 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.

The Broadstreet plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.53.1 via the get_sponsored_meta() AJAX action. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract data from password protected and private business details.

The Broadstreet plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the create_advertiser AJAX action in all versions up to, and including, 1.53.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to create advertisers.

The Broadstreet WordPress plugin before 1.51.8 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 Broadstreet plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘zone’ parameter in all versions up to, and including, 1.51.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.