CVE-2021-24857: Nocean Totop Link

Critical severity, CVSS 9.8. EPSS: 1.9% chance of exploitation in the next 30 days.

The ToTop Link WordPress plugin through 1.7.1 passes base64 encoded user input to the unserialize() PHP function, which could lead to PHP Object injection if a plugin installed on the blog has a suitable gadget chain.

Affected products

• Nocean Totop Link: up to and including 1.7.1

Published 2021-12-13. Last modified 2026-06-17.