Is CVE-2024-21509 in the CISA KEV catalog?

No. CVE-2024-21509 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-21509?

CVE-2024-21509 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2024-21509?

CVE-2024-21509 has an EPSS score of 0.96% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-21509?

Upgrade mysql2 to 3.9.4 or later.

CVE & CISA-KEV Catalog

CVE-2024-21509

MEDIUM

6.5

CVSS v3

NVD

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.

CWE-1321

How to fix

Remediation Available

mysql2NVD

Affected:< 3.9.4Fixed in:3.9.4CVE-2024-21509derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Exploit Intelligence

0.96%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Patch1

github.com

Exploit3

Release Notes1

github.com

Other references1

github.com

Related Vulnerabilities

Other CWE-1321 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0230	Critical	9.8	97%	-	-
CVE-2019-11358	Medium	6.1	87%	-	Fix
CVE-2020-7774	High	7.3	69%	-	Fix
CVE-2022-24760	Critical	10.0	49%	-	Fix
CVE-2022-39396	Critical	9.8	39%	-	Fix
CVE-2022-2564	Critical	9.8	33%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-06-17.