What’s Vulnerable › Vulnerabilities

CVE-2024-21507

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-04-10 · updated 2026-06-17
• Weakness: CWE-20

Description

Versions of the package mysql2 before 3.9.3 are vulnerable to Improper Input Validation through the keyFromFields function, resulting in cache poisoning. An attacker can inject a colon (:) character within a value of the attacker-crafted key.

Affected products

• mysql2: before 3.9.3 — fixed in 3.9.3

How to fix

Upgrade to a fixed version: mysql2 3.9.3. Check the vendor advisory for mitigations.

References

• https://blog.slonser.info/posts/mysql2-attacker-configuration/
• https://github.com/sidorares/node-mysql2/commit/0d54b0ca6498c823098426038162ef10df02c818
• https://github.com/sidorares/node-mysql2/pull/2424
• https://security.snyk.io/vuln/SNYK-JS-MYSQL2-6591300
• https://blog.slonser.info/posts/mysql2-attacker-configuration/
• https://github.com/sidorares/node-mysql2/commit/0d54b0ca6498c823098426038162ef10df02c818
• https://github.com/sidorares/node-mysql2/pull/2424
• https://security.snyk.io/vuln/SNYK-JS-MYSQL2-6591300

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