CVE-2023-30421

LOW

Published Apr 19, 2025 Modified Apr 15, 2026 CWE-407

Description

mystrtod in mjson 1.2.7 requires more than a billion iterations during processing of certain digit strings such as 8891110122900e913013935755114.

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CVSS v3.1 Score

2.9

LOW

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

Weakness Type (CWE)

CWE-407 CWE-407

References

Other References

https://github.com/boofish/json_bugs/blob/main/mjson https://github.com/cesanta/mjson/releases

Frequently Asked Questions

What is CVE-2023-30421? +

mystrtod in mjson 1.2.7 requires more than a billion iterations during processing of certain digit strings such as 8891110122900e913013935755114. It has a CVSS v3.1 base score of 2.9 (LOW).

How severe is CVE-2023-30421? +

CVE-2023-30421 has a CVSS v3.1 score of 2.9 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

How do I check if I'm vulnerable to CVE-2023-30421? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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