CVE-2025-15056 Quill 2.0.3 - Lack of data validation in HTML export allowing XSS
An attacker can inject malicious scripts via the HTML export feature in Quill, potentially executing code in the victim's browser.
- 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-2025-15056?
CVE-2025-15056 is a medium-severity cross-site scripting vulnerability in Slab Quill, published on 13 Jan 2026. 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 lack of data validation vulnerability in the HTML export feature in Quill in allows Cross-Site Scripting (XSS).
This issue affects Quill: 2.0.3.
Weakness: CWE-79
Which versions are affected by CVE-2025-15056?
2 open source packages ship an affected version, including quill. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
quill npm | All versions | None |
quill npm | All versions | None |
Products include Slab Quill.
How do I fix CVE-2025-15056?
No fix has been published for CVE-2025-15056 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-2025-15056 being exploited?
There is no known exploitation of CVE-2025-15056 in the wild and no public exploit code.
Other vulnerabilities in Slab Quill
Sources
Also known as GHSA-v3m3-f69x-jf25.