CVE-2020-24343

Name: CVE-2020-24343
Creator: NVD / NIST
Published: 2020-08-13T19:15:13.677+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.83%

Last modified Jun 17, 2026

CVE-2020-24343 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Artifex MuJS through 1.0.7 has a use-after-free in jsrun.c because of unconditional marking in jsgc.c.. EPSS estimates a 0.83% chance of exploitation in the next 30 days.

Description

Artifex MuJS through 1.0.7 has a use-after-free in jsrun.c because of unconditional marking in jsgc.c.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.83%

52.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Artifex	Mujs	<= 1.0.7

References

https://github.com/ccxvii/mujs/issues/136Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/ccxvii/mujs/issues/136Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Aug 13, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24343?

Artifex MuJS through 1.0.7 has a use-after-free in jsrun.c because of unconditional marking in jsgc.c.

How severe is CVE-2020-24343?

CVE-2020-24343 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.83% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24343?

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-2020-24343?

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

Scan your code now

Source: NVD / NIST