CVE-2020-5948 Cross-site scripting in BIG-IP

Critical 9.6 Published 11 Dec 2020 Updated 4 Aug 2024

Reflected XSS in iControl REST allows attackers to compromise the system if an admin user is targeted.

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-2020-5948?

CVE-2020-5948 is a critical cross-site scripting vulnerability in F5 Big-Ip Access Policy Manager, published on 11 Dec 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

On BIG-IP versions 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.2.7, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, undisclosed endpoints in iControl REST allow for a reflected XSS attack, which could lead to a complete compromise of the BIG-IP system if the victim user is granted the admin role.

Weakness: CWE-79

Which versions are affected by CVE-2020-5948?

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-2020-5948?

No fix has been published for CVE-2020-5948 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-2020-5948 being exploited?

There is no known exploitation of CVE-2020-5948 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-c7r4-5f37-6572.