What’s Vulnerable › Vulnerabilities

CVE-2024-21509

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-04-10 · updated 2026-06-17
• Weakness: CWE-1321

Description

Versions of the package mysql2 before 3.9.4 are vulnerable to Prototype Poisoning due to insecure results object creation and improper user input sanitization passed through parserFn in text_parser.js and binary_parser.js.

Affected products

• mysql2: before 3.9.4 — fixed in 3.9.4

How to fix

Upgrade to a fixed version: mysql2 3.9.4. Check the vendor advisory for mitigations.

References

• https://blog.slonser.info/posts/mysql2-attacker-configuration/
• https://github.com/sidorares/node-mysql2/blob/fd3d117da82cc5c5fa5a3701d7b33ca77691bc61/lib/parsers/text_parser.js%23L134
• https://github.com/sidorares/node-mysql2/commit/4a964a3910a4b8de008696c554ab1b492e9b4691
• https://github.com/sidorares/node-mysql2/pull/2574
• https://github.com/sidorares/node-mysql2/releases/tag/v3.9.4
• https://security.snyk.io/vuln/SNYK-JS-MYSQL2-6591084
• https://blog.slonser.info/posts/mysql2-attacker-configuration/
• https://github.com/sidorares/node-mysql2/blob/fd3d117da82cc5c5fa5a3701d7b33ca77691bc61/lib/parsers/text_parser.js%23L134
• https://github.com/sidorares/node-mysql2/commit/4a964a3910a4b8de008696c554ab1b492e9b4691
• https://github.com/sidorares/node-mysql2/pull/2574
• https://github.com/sidorares/node-mysql2/releases/tag/v3.9.4
• https://security.snyk.io/vuln/SNYK-JS-MYSQL2-6591084

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