CVE-2021-4387: Wpopal Opal Estate

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

The Opal Estate plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.6.11. This is due to missing or incorrect nonce validation on the opalestate_set_feature_property() and opalestate_remove_feature_property() functions. This makes it possible for unauthenticated attackers to set and remove featured properties via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

• Wpopal Opal Estate: up to and including 1.6.11

Published 2023-07-01. Last modified 2026-06-17.