Vulnerability · Published Jan 13, 2026 · Assigned by Fluid Attacks

CVE-2025-15056Quill 2.0.3 - Lack of data validation in HTML export allowing XSS

Medium 5.1

In plain English

A medium-severity cross-site scripting in Quill from Slab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 4.0)5.1Medium

Exploit odds (30 days)0.3%top 80.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	quill	no fix listed	GHSA-v3m3-f69x-jf25

Affected products (as reported)

Vendor	Product	Versions
Slab	Quill	2.0.3

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

References

https://fluidattacks.com/advisories/diomedes third-party-advisory
https://github.com/slab/quill product