Is CVE-2020-21890 in the CISA KEV catalog?

No. CVE-2020-21890 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-21890?

CVE-2020-21890 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2020-21890?

CVE-2020-21890 has an EPSS score of 0.71% (49th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-21890?

Upgrade ghostscript on debian 11 to 9.51~dfsg-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-21890

HIGH

7.8

CVSS v3

NVD

Description

Buffer Overflow vulnerability in clj_media_size function in devices/gdevclj.c in Artifex Ghostscript 9.50 allows remote attackers to cause a denial of service or other unspecified impact(s) via opening of crafted PDF document.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

ghostscriptDebian

Fixed in:9.51~dfsg-1CVE-2020-21890

ghostscriptUbuntu

Fixed in:9.26~dfsg+0-0ubuntu0.16.04.14+esm7USN-6364-1

Fixed in:9.26~dfsg+0-0ubuntu0.18.04.18+esm2USN-6364-1

Fixed in:9.50~dfsg-5ubuntu4.10USN-6364-1

libgs9Ubuntu

Fixed in:9.26~dfsg+0-0ubuntu0.16.04.14+esm7USN-6364-1

Fixed in:9.26~dfsg+0-0ubuntu0.18.04.18+esm2USN-6364-1

Fixed in:9.50~dfsg-5ubuntu4.10USN-6364-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.71%probability of exploitation in 30 days

49thpercentile

Moderate risk: more likely to be exploited than 49% of all known CVEs.

References

Patch1

bugs.ghostscript.com

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.