CVE-2020-19203 Cross-site scripting in n/a
Authenticated attackers can inject malicious scripts via the wake-on-LAN description field in pfSense, potentially leading to session hijacking or code execution.
- 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-2020-19203?
CVE-2020-19203 is a medium-severity cross-site scripting vulnerability in n/a, published on 12 Jul 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
An authenticated Cross-Site Scripting (XSS) vulnerability was found in widgets/widgets/wake_on_lan_widget.php, a component of the pfSense software WebGUI, on version 2.4.4-p2 and earlier. The widget did not encode the descr (description) parameter of wake-on-LAN entries in its output, leading to a possible stored XSS.
Weakness: CWE-79
Which versions are affected by CVE-2020-19203?
It affects 1 product.
Products include Netgate Pfsense.
How do I fix CVE-2020-19203?
No fix has been published for CVE-2020-19203 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-2020-19203 being exploited?
There is no known exploitation of CVE-2020-19203 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-4wj2-v574-g827.