CVE-2021-31761 Cross-site scripting in n/a

Critical 9.6 Published 25 Apr 2021 Updated 3 Aug 2024

Reflected XSS in Webmin allows attackers to execute remote commands via the running process feature, potentially leading to full system compromise.

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-2021-31761?

CVE-2021-31761 is a critical cross-site scripting vulnerability in Webmin Webmin, published on 25 Apr 2021. 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

Webmin 1.973 is affected by reflected Cross Site Scripting (XSS) to achieve Remote Command Execution through Webmin's running process feature.

Weakness: CWE-79

Which versions are affected by CVE-2021-31761?

It affects 1 product.

Products include Webmin Webmin.

How do I fix CVE-2021-31761?

No fix has been published for CVE-2021-31761 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-2021-31761 being exploited?

There is no known exploitation of CVE-2021-31761 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry and 2 proofs of concept on GitHub.

All Webmin Webmin vulnerabilities

Sources

Also known as GHSA-v8w5-257f-g592.