CVE-2021-33796: artifex mujs Use After Free
CVSS: 10.0v3.1CriticalModified
AliasesUBUNTU-CVE-2021-33796DEBIAN-CVE-2021-33796
Published 07-07-2023Last modified 12-11-2024
Vulnerability summary
CVE-2021-33796 is a critical (CVSS 10.0) Use After Free vulnerability in artifex mujs. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.7% of scored vulnerabilities.
CVSS score
10.0/10
010
Critical · v3.1 (CVE.org)EPSS score
0.71%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 07-07-2023PublishedVulnerability first disclosed.
- 12-11-2024Last modifiedVulnerability information updated.
Description
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
CVSS metrics
4 scores · 4 sources · 1 versionCritical 10.0Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HSources4 sources · 7.5–10.0
- OSV · UbuntuEcosystem advisory · calculated10.0CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.71%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
0.00 pp
From 0.71% on 18-09-2026
18-09-202618-10-2026
EPSS score0.71%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Artifex1 product
- mujs< 1.1.2
Debian1 product
- mujs< 1.1.3-2
Mujs1 product
- mujs≥ 1.1.1, ≤ all
Ubuntu1 product
- mujs< 1.1.3-3
4 vendors · 4 products
