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

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.007 (51.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-33796: held from 0.007 to 0.007.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

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.