CVE-2021-23447 Cross-site Scripting (XSS)
An attacker can execute arbitrary scripts by exploiting a type confusion vulnerability that bypasses input sanitization in the teddy template engine.
- 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
- Available
What is CVE-2021-23447?
CVE-2021-23447 is a medium-severity cross-site scripting vulnerability in teddy, published on 7 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
This affects the package teddy before 0.5.9. A type confusion vulnerability can be used to bypass input sanitization when the model content is an array (instead of a string).
Weakness: CWE-843
Which versions are affected by CVE-2021-23447?
2 open source packages ship an affected version, including teddy. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
teddy npm | All versions | 0.5.9 |
teddy npm | All versions | 0.5.9 |
Products include Teddy Project Teddy.
How do I fix CVE-2021-23447?
Upgrade teddy to 0.5.9 or later.
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-2021-23447 being exploited?
There is no known exploitation of CVE-2021-23447 in the wild and no public exploit code.
Sources
Also known as GHSA-5f38-9jw2-6r6h, SNYK-JS-TEDDY-1579557.