CVE-2018-20859 Cross-site scripting in n/a

Medium 6.1 Published 30 Jul 2019 Updated 5 Aug 2024

Attackers can inject malicious scripts via chemical equation responses in the edX platform, potentially compromising user sessions.

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-2018-20859?

CVE-2018-20859 is a medium-severity cross-site scripting vulnerability in n/a, published on 30 Jul 2019. 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

edx-platform before 2018-07-18 allows XSS via a response to a Chemical Equation advanced problem.

Weakness: CWE-79

Which versions are affected by CVE-2018-20859?

It affects 1 product.

Products include Edx Edx-Platform.

How do I fix CVE-2018-20859?

No fix has been published for CVE-2018-20859 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-2018-20859 being exploited?

There is no known exploitation of CVE-2018-20859 in the wild and no public exploit code.

Sources

Also known as GHSA-mrv2-vg67-g8pw.