CVE-2022-42094 Cross-site Scripting in Backdrop CMS

Medium 4.8 Published 22 Nov 2022 Updated 29 Apr 2025

Attackers can inject malicious scripts into Backdrop CMS via Card content, potentially stealing user sessions or executing code.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2022-42094?

CVE-2022-42094 is a medium-severity cross-site scripting vulnerability in n/a, published on 22 Nov 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

Backdrop CMS version 1.23.0 was discovered to contain a stored cross-site scripting (XSS) vulnerability via the 'Card' content.

Weakness: CWE-79

Which versions are affected by CVE-2022-42094?

2 open source packages ship an affected version, including backdrop/backdrop. It affects 1 product.

Package	Affected	Fixed in
`backdrop/backdrop` Packagist	All versions to `1.23.0`	None
`backdrop/backdrop` Packagist	All versions to `1.23.0`	None

Products include Backdropcms Backdrop.

How do I fix CVE-2022-42094?

No fix has been published for CVE-2022-42094 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-2022-42094 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-42094 exists.

Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.

Sources

Also known as GHSA-vcvg-g8p2-3hqr.