CVE-2025-9887: Bittokazi Custom Login And Signup Widget

Medium severity, CVSS 4.3. EPSS: 0.1% chance of exploitation in the next 30 days.

The Custom Login And Signup Widget plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0. This is due to missing or incorrect nonce validation in the /frndzk_adminclsw.php file. This makes it possible for unauthenticated attackers to change the email and username settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

• Bittokazi Custom Login And Signup Widget: up to and including 1.0

Published 2025-09-20. Last modified 2026-06-17.