CVE-2021-3163 Cross-site Scripting in quill
An attacker can execute arbitrary JavaScript via stored XSS in the Quill HTML editor, though researchers dispute this as intended browser behavior.
- 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-2021-3163?
CVE-2021-3163 is a medium-severity cross-site scripting vulnerability in n/a, published on 12 Apr 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 vulnerability in the HTML editor of Slab Quill 4.8.0 allows an attacker to execute arbitrary JavaScript by storing an XSS payload (a crafted onloadstart attribute of an IMG element) in a text field. Note: Researchers have claimed that this issue is not within the product itself, but is intended behavior in a web browser
Weakness: CWE-79
Which versions are affected by CVE-2021-3163?
2 open source packages ship an affected version, including quill. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
quill npm | All versions to 1.3.7 | None |
quill npm | All versions to 1.3.7 | None |
Products include Slab Quill.
How do I fix CVE-2021-3163?
No fix has been published for CVE-2021-3163 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-2021-3163 being exploited?
There is no known exploitation of CVE-2021-3163 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-4943-9vgg-gr5r.