CVE-2021-23020: F5 Nginx Controller

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

The NAAS 3.x before 3.10.0 API keys were generated using an insecure pseudo-random string and hashing algorithm which could lead to predictable keys.

Affected products

• F5 Nginx Controller: from 3.0.0, before 3.10.0 (fixed in 3.10.0)

Published 2021-06-01. Last modified 2026-06-17.