CVE-2023-30087

Name: CVE-2023-30087
Creator: NVD / NIST
Published: 2023-05-09T16:15:14.547+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2023-30087 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Buffer Overflow vulnerability found in Cesanta MJS v.1.26 allows a local attacker to cause a denial of service via the mjs_mk_string function in mjs.c.. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

Buffer Overflow vulnerability found in Cesanta MJS v.1.26 allows a local attacker to cause a denial of service via the mjs_mk_string function in mjs.c.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.26%

16.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cesanta	Mjs	1.26

References

https://github.com/cesanta/mjs/issues/244Exploit, Issue Tracking, Vendor Advisory
https://github.com/cesanta/mjs/issues/244Exploit, Issue Tracking, Vendor Advisory

Timeline

Published: May 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-30087?

Buffer Overflow vulnerability found in Cesanta MJS v.1.26 allows a local attacker to cause a denial of service via the mjs_mk_string function in mjs.c.

How severe is CVE-2023-30087?

CVE-2023-30087 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2023-30087?

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-2023-30087?

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

Scan your code now

Source: NVD / NIST