CVE-2020-5901 Cross-site scripting in NGINX Controller

Critical 9.6 Published 1 Jul 2020 Updated 4 Aug 2024

Reflected XSS in NGINX Controller allows attackers to compromise the system if an admin user is logged in.

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-2020-5901?

CVE-2020-5901 is a critical cross-site scripting vulnerability in NGINX Controller, 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 NGINX Controller 3.3.0-3.4.0, undisclosed API endpoints may allow for a reflected Cross Site Scripting (XSS) attack. If the victim user is logged in as admin this could result in a complete compromise of the system.

Weakness: CWE-79

Which versions are affected by CVE-2020-5901?

It affects 1 product.

Products include F5 Nginx Controller.

How do I fix CVE-2020-5901?

No fix has been published for CVE-2020-5901 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-2020-5901 being exploited?

There is no known exploitation of CVE-2020-5901 in the wild and no public exploit code.

Sources

Also known as GHSA-j2cc-c3x7-54xh.