What’s Vulnerable › Vulnerabilities

CVE-2022-39396: Parse Server vulnerable to Remote Code Execution via prototype pollution in MongoDB BSON parser

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 38.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-10 · updated 2026-06-17
• Weakness: CWE-1321

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Versions prior to 4.10.18, and prior to 5.3.1 on the 5.X branch, are vulnerable to Remote Code Execution via prototype pollution. An attacker can use this prototype pollution sink to trigger a remote code execution through the MongoDB BSON parser. This issue is patched in version 5.3.1 and in 4.10.18. There are no known workarounds.

Affected products

• parse-community parse-server: before 4.10.18; from 5.0.0 before 5.3.1 — fixed in 4.10.18, 5.3.1

How to fix

Upgrade to a fixed version: parse-community parse-server 4.10.18, 5.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/parse-community/parse-server/security/advisories/GHSA-prm5-8g2m-24gg
• https://github.com/parse-community/parse-server/security/advisories/GHSA-prm5-8g2m-24gg

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