CVE-2020-8291 Cross-site scripting in Rocket.Chat server
Attackers can execute arbitrary scripts in user browsers via link preview rendering, potentially leading to account takeover.
- 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-2020-8291?
CVE-2020-8291 is a medium-severity cross-site scripting vulnerability in Rocket.chat Rocket.chat, published on 18 Oct 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
A link preview rendering issue in Rocket.Chat versions before 3.9 could lead to potential XSS attacks.
Weakness: CWE-79
Which versions are affected by CVE-2020-8291?
It affects 1 product.
Products include Rocket.chat Rocket.chat.
How do I fix CVE-2020-8291?
No fix has been published for CVE-2020-8291 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-2020-8291 being exploited?
There is no known exploitation of CVE-2020-8291 in the wild and no public exploit code.
Other vulnerabilities in Rocket.chat Rocket.chat
Sources
Also known as GHSA-5vc2-xx2f-qhg3.