CVE-2020-5903 Cross-site scripting in BIG-IP

Medium 6.1 Published 1 Jul 2020 Updated 4 Aug 2024

An attacker can execute arbitrary scripts in the BIG-IP Configuration utility via a Cross-Site Scripting vulnerability, potentially compromising user sessions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2020-5903?

CVE-2020-5903 is a medium-severity cross-site scripting vulnerability in F5 Big-Ip Access Policy Manager, published on 1 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, a Cross-Site Scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility.

Weakness: CWE-79

Which versions are affected by CVE-2020-5903?

It affects 11 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Domain Name System and 5 more.

How do I fix CVE-2020-5903?

No fix has been published for CVE-2020-5903 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-5903 being exploited?

There is no known exploitation of CVE-2020-5903 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-q6xc-mgx9-83rc.