CVE-2020-21896 — MEDIUM (5.5)

Vulnerability 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 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Artifex	Mupdf	1.16.0

Related Weaknesses (CWE)

CWE-416

References

http://www.ghostscript.com/cgi-bin/findgit.cgi?8719e07834d6a72b6b4131539e49ed1e8
https://bugs.ghostscript.com/show_bug.cgi?id=701294ExploitIssue TrackingPatch
https://bugs.ghostscript.com/show_bug.cgi?id=701294ExploitIssue TrackingPatch
https://lists.debian.org/debian-lts-announce/2025/08/msg00017.html

FAQ

What is CVE-2020-21896?

CVE-2020-21896 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...

How severe is CVE-2020-21896?

CVE-2020-21896 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-21896?

Check the references section above for vendor advisories and patch information. Affected products include: Artifex Mupdf.