CVE-2023-50044

Name: CVE-2023-50044
Creator: NVD / NIST
Published: 2023-12-20T09:15:07.297+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.86%

Last modified Jun 17, 2026

CVE-2023-50044 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Cesanta MJS 2.20.0 has a getprop_builtin_foreign out-of-bounds read if a Built-in API name occurs in a substring of an input string.. EPSS estimates a 0.86% chance of exploitation in the next 30 days.

Description

Cesanta MJS 2.20.0 has a getprop_builtin_foreign out-of-bounds read if a Built-in API name occurs in a substring of an input string.

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

0.86%

53.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Cesanta	Mjs	2.22.0

References

https://github.com/cesanta/mjs/issues/254Exploit, Issue Tracking
https://github.com/cesanta/mjs/pull/255Patch
https://github.com/cesanta/mjs/issues/254Exploit, Issue Tracking
https://github.com/cesanta/mjs/pull/255Patch

Timeline

Published: Dec 20, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-50044?

Cesanta MJS 2.20.0 has a getprop_builtin_foreign out-of-bounds read if a Built-in API name occurs in a substring of an input string.

How severe is CVE-2023-50044?

CVE-2023-50044 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.86% probability of exploitation in the next 30 days.

How do I fix CVE-2023-50044?

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-2023-50044?

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

Scan your code now

Source: NVD / NIST