Improper authorization in BIG-IP Advanced WAF and ASM REST API

Published: 2021-04-29
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-23014
Exploitation vector Network
Public exploit N/A
Vulnerable software
BIG-IP Advanced WAF
Client/Desktop applications / Antivirus software/Personal firewalls

Hardware solutions / Security hardware applicances

Vendor F5 Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper Authorization

EUVDB-ID: #VU52747

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23014

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No


The vulnerability allows a remote user to perform unauthorized actions.

The vulnerability exists due to improper authorization within the within the REST API. A remote user with guest privileges can upload and overwrite a limited set of files on BIG-IP Advanced WAF and ASM systems.


Install updates from vendor's website.

Vulnerable software versions

BIG-IP Advanced WAF: 14.1.0 - 16.0.1

BIG-IP ASM: 14.1.0 - 16.0.1

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.