What is CVE-2021-45005?

CVE-2021-45005 is a critical-severity vulnerability in Artifex Mujs, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-02-14.

How severe is CVE-2021-45005?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Artifex Mujs

CVE-2021-45005

Artifex MuJS v1.1.3 was discovered to contain a heap buffer overflow which is caused by conflicting JumpList of nested try/finally statements.

Vulnerability class: Buffer Overflow

Published 2022-02-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.014 · change: -0.000

Affected products

Artifex Mujs — versions 1.1.3

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

bugs.ghostscript.com/show_bug.cgi (Permissions Required)
github.com/ccxvii/mujs/commit/df8559e7bdbc6065276e786217eeee70f28fce66 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-45005?: CVE-2021-45005 is a critical-severity vulnerability in Artifex Mujs, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-02-14.
How severe is CVE-2021-45005?: Critical severity. CVSS v3 base score is 9.8 out of 10.