CVE-2020-12113 Cross-site scripting in n/a

Medium 6.1 Published 23 Apr 2020 Updated 4 Aug 2024

Attackers can inject malicious scripts via closed captions in BigBlueButton, potentially executing code or hijacking 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-2020-12113?

CVE-2020-12113 is a medium-severity cross-site scripting vulnerability in n/a, published on 23 Apr 2020. 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

BigBlueButton before 2.2.4 allows XSS via closed captions because dangerouslySetInnerHTML in React is used.

Weakness: CWE-79

Which versions are affected by CVE-2020-12113?

It affects 1 product.

Products include Bigbluebutton Bigbluebutton.

How do I fix CVE-2020-12113?

No fix has been published for CVE-2020-12113 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-2020-12113 being exploited?

There is no known exploitation of CVE-2020-12113 in the wild and no public exploit code.

Sources

Also known as GHSA-cqwp-79jx-jvm5.