What is CVE-2020-24343?

CVE-2020-24343 is a high-severity vulnerability in Artifex Mujs, classified under Use After Free. CVSS score: 7.8/10. Published 2020-08-13.

How severe is CVE-2020-24343?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Artifex Mujs

CVE-2020-24343

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

Vulnerability class: Use-After-Free

Published 2020-08-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Artifex Mujs

Weakness classification (CWE)

CWE-416 — Use After Free

References

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

Frequently asked questions

What is CVE-2020-24343?: CVE-2020-24343 is a high-severity vulnerability in Artifex Mujs, classified under Use After Free. CVSS score: 7.8/10. Published 2020-08-13.
How severe is CVE-2020-24343?: High severity. CVSS v3 base score is 7.8 out of 10.