5.5

CVE-2020-21896: artifex mupdf Use After Free

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2020-21896DEBIAN-CVE-2020-21896DLA-4278-1
Published 22-08-2023Last modified 03-11-2025
Open JSON

Vulnerability summary

CVE-2020-21896 is a medium (CVSS 5.5) Use After Free vulnerability in artifex mupdf. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 42% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.51%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-7825-1

Timeline

  1. 22-08-2023
    PublishedVulnerability first disclosed.
  2. 03-11-2025
    Last modifiedVulnerability information updated.

Description

A Use After Free vulnerability in svg_dev_text_span_as_paths_defs function in source/fitz/svg-device.c in Artifex Software MuPDF 1.16.0 allows remote attackers to cause a denial of service via opening of a crafted PDF file.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

0.00 pp

From 0.51% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.51%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugs.ghostscript.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Artifex1 product
Debian1 product
  • mupdf< 1.19.0+ds1-1 | < 1.17.0+ds1-2+deb11u1
Ubuntu1 product
  • mupdf< 1.12.0+ds1-1ubuntu0.1~esm1 | < 1.16.1+ds1-1ubuntu1+esm1

3 vendors · 3 products

References

7 links