CVE-2024-13883: Victorfreitas Wpupper Share Buttons

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

The WPUpper Share Buttons plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.51. This is due to missing or incorrect nonce validation on the 'save_custom_css_request' function. This makes it possible for unauthenticated attackers to inject custom CSS to modify a site via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

• Victorfreitas Wpupper Share Buttons: up to and including 3.51

Published 2025-02-21. Last modified 2026-06-17.