Use After Free in Artifex Mujs

CVE-2021-33796

In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.

Vulnerability class: Use-After-Free

EPSS: 0.007 (48.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Artifex Mujs
Mujs — versions 1.1.1

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

patrick@puiterwijk.org (Patch)

Frequently asked questions

What is CVE-2021-33796?: CVE-2021-33796 is a critical-severity vulnerability in Artifex Mujs, classified under Use After Free. CVSS score: 10.0/10. Published 2023-07-07.
How severe is CVE-2021-33796?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2021-33796 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.