CVE-2021-34654: Custom Post Type Relations Project Custom Post Type Relations

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

The Custom Post Type Relations WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the cptr[name] parameter found in the ~/pages/admin-page.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.

Affected products

• Custom Post Type Relations Project Custom Post Type Relations: up to and including 1.0

Published 2021-08-16. Last modified 2026-06-17.