CVE-2021-23014

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-05-10 · updated 2026-06-17
Weakness: CWE-862

Description

On versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, and 14.1.x before 14.1.4, BIG-IP Advanced WAF and ASM are missing authorization checks for file uploads to a specific directory within the REST API which might allow Authenticated users with guest privileges to upload files. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

F5 Big-Ip Advanced Web Application Firewall: from 14.1.0 before 14.1.4; from 15.1.0 before 15.1.3; from 16.0.0 before 16.0.1.1 — fixed in 14.1.4, 15.1.3, 16.0.1.1
BIG-IP ASM: from 14.1.0 before 14.1.4; from 15.1.0 before 15.1.3; from 16.0.0 before 16.0.1.1 — fixed in 14.1.4, 15.1.3, 16.0.1.1

How to fix

Upgrade to a fixed version: F5 Big-Ip Advanced Web Application Firewall 14.1.4, 15.1.3, 16.0.1.1; BIG-IP ASM 14.1.4, 15.1.3, 16.0.1.1. Check the vendor advisory for mitigations.

References

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