# Withdrawn Advisory: Insufficient Granularity of Access Control in JSDom

Advisory record · `GHSA-f4c9-cqv8-9v98` · Withdrawn

- **Identifiers:** `GHSA-f4c9-cqv8-9v98` · `CVE-2021-20066`
- **State:** Withdrawn
- **Severity:** CVSS 0.0 None
- **Critical:** No
- **Weakness (CWE):** [CWE-1220](https://cwe.mitre.org/data/definitions/1220.html)
- **Tags:** [CWE-1220](https://agentprime.io/advisories/tag/cwe-1220.md)
- **Published:** 24 May 2022
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

**Withdrawn.** The GitHub Advisory Database withdrew this advisory on 19 Jul 2024. The record stays here, marked withdrawn.

Published by the GitHub Advisory Database at 24 May 2022, 17:42 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `jsdom` (npm): affected `<16.5.0`; fixed in `16.5.0`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 0.0 None, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.014, the 72nd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 24 May 2022. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-f4c9-cqv8-9v98](https://github.com/advisories/GHSA-f4c9-cqv8-9v98)
- [OSV: GHSA-f4c9-cqv8-9v98](https://osv.dev/vulnerability/GHSA-f4c9-cqv8-9v98)
- <https://nvd.nist.gov/vuln/detail/CVE-2021-20066>
- <https://github.com/jsdom/jsdom/issues/3124>
- <https://github.com/jsdom/jsdom/issues/3124#issuecomment-783502951>
- <https://github.com/jsdom/jsdom>
- <https://security.snyk.io/vuln/SNYK-JS-JSDOM-1075447>
- <https://www.tenable.com/security/research/tra-2021-05>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-f4c9-cqv8-9v98>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-f4c9-cqv8-9v98/>. Everything for agents: <https://agentprime.io/llms.txt>.