CVE-2018-13879 Cross-site scripting in n/a

Medium 5.4 Published 11 Jul 2018 Updated 17 Sep 2024

Reflected XSS in Rocket.Chat registration allows attackers to execute scripts via unescaped username error messages.

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: None listed

What is CVE-2018-13879?

CVE-2018-13879 is a medium-severity cross-site scripting vulnerability in Rocket.chat Rocket.chat, published on 11 Jul 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A reflected XSS issue was discovered in the registration form in Rocket.Chat before 0.66. When one creates an account, the next step will ask for a username. This field will not save HTML control characters but an error will be displayed that shows the attempted username unescaped via packages/rocketchat-ui-login/client/username/username.js in packages/rocketchat-ui-login/client/username/username.html.

Weakness: CWE-79

Which versions are affected by CVE-2018-13879?

It affects 1 product.

Products include Rocket.chat Rocket.chat.

How do I fix CVE-2018-13879?

No fix has been published for CVE-2018-13879 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-2018-13879 being exploited?

There is no known exploitation of CVE-2018-13879 in the wild and no public exploit code.

All Rocket.chat Rocket.chat vulnerabilities

Sources

Also known as GHSA-jf3p-59jq-4gpv.