CVE-2020-26693 Cross-site scripting in n/a

Medium 5.4 Published 1 Jun 2021 Updated 4 Aug 2024

An authenticated attacker can execute arbitrary web scripts in pfSense via the load balancer monitor, potentially leading to session hijacking or further compromise.

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

What is CVE-2020-26693?

CVE-2020-26693 is a medium-severity cross-site scripting vulnerability in n/a, published on 1 Jun 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A stored cross-site scripting (XSS) vulnerability was discovered in pfSense 2.4.5-p1 which allows an authenticated attacker to execute arbitrary web scripts via exploitation of the load_balancer_monitor.php function.

Weakness: CWE-79

Which versions are affected by CVE-2020-26693?

It affects 1 product.

Products include Pfsense Pfsense.

How do I fix CVE-2020-26693?

No fix has been published for CVE-2020-26693 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-2020-26693 being exploited?

There is no known exploitation of CVE-2020-26693 in the wild and no public exploit code.

Sources

Also known as GHSA-hrmg-qfwm-rm4f.