The Classified Listing plugin for WordPress suffers from a code injection vulnerability (CWE-94) where arbitrary shortcode execution is possible. This occurs because the plugin does not properly validate user-supplied input before invoking the WordPress do_shortcode function. Authenticated attackers with at least Subscriber privileges can exploit this to execute arbitrary shortcodes, potentially affecting site confidentiality and integrity. The CVSS 3.1 base score is 5.4 (medium), reflecting network attack vector, low attack complexity, and low privileges required.

Successful exploitation allows authenticated users with Subscriber-level access or above to execute arbitrary shortcodes, which may lead to limited confidentiality and integrity impacts on the affected WordPress site. There is no indication of availability impact. No known exploits are reported in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Subscriber-level user capabilities where possible and monitor for suspicious shortcode usage. Avoid granting unnecessary privileges to untrusted users.