CVE-2021-4424: Quantumcloud Slider Hero

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

The Slider Hero plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 8.2.0. This is due to missing or incorrect nonce validation on the qc_slider_hero_duplicate() function. This makes it possible for unauthenticated attackers to duplicate slides via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

• Quantumcloud Slider Hero: up to and including 8.2.0

Published 2023-07-12. Last modified 2026-06-17.