CVE-2023-43338

Name: CVE-2023-43338
Creator: NVD / NIST
Published: 2023-09-23T00:15:20.17+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2023-43338 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Cesanta mjs v2.20.0 was discovered to contain a function pointer hijacking vulnerability via the function mjs_get_ptr(). This vulnerability allows attackers to execute arbitrary code via a crafted input.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

Cesanta mjs v2.20.0 was discovered to contain a function pointer hijacking vulnerability via the function mjs_get_ptr(). This vulnerability allows attackers to execute arbitrary code via a crafted input.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.90%

55.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Cesanta	Mjs	2.20.0

References

https://github.com/cesanta/mjs/issues/250Exploit, Issue Tracking, Vendor Advisory
https://github.com/cesanta/mjs/issues/250Exploit, Issue Tracking, Vendor Advisory

Timeline

Published: Sep 23, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-43338?

How severe is CVE-2023-43338?

CVE-2023-43338 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2023-43338?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-43338?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST