CVE-2020-8820 Cross-site scripting in n/a
Attackers can inject malicious scripts into the Cluster Shell Commands field, leading to code execution or account takeover when the menu is revisited.
- 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
- Available
What is CVE-2020-8820?
CVE-2020-8820 is a medium-severity cross-site scripting vulnerability in Webmin Webmin, published on 12 Oct 2020. 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 XSS Vulnerability exists in Webmin 1.941 and earlier affecting the Cluster Shell Commands Endpoint. A user may enter any XSS Payload into the Command field and execute it. Then, after revisiting the Cluster Shell Commands Menu, the XSS Payload will be rendered and executed.
Weakness: CWE-79
Which versions are affected by CVE-2020-8820?
It affects 1 product.
Products include Webmin Webmin.
How do I fix CVE-2020-8820?
Upgrade to a fixed version.
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-2020-8820 being exploited?
There is no known exploitation of CVE-2020-8820 in the wild and no public exploit code.
Other vulnerabilities in Webmin Webmin
Sources
Also known as GHSA-fcgp-r4vf-4x3h.