Is CVE-2020-27223 in the CISA KEV catalog?

No. CVE-2020-27223 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-27223?

CVE-2020-27223 has a CVSS v3 base score of 5.2 (MEDIUM).

What is the EPSS score for CVE-2020-27223?

CVE-2020-27223 has an EPSS score of 77.95% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-27223?

Upgrade jetty9 on debian 11 to 9.4.38-1 or later.

CVE & CISA-KEV Catalog

CVE-2020-27223

MEDIUMEPSS 100th pctl

5.2

CVSS v3

NVD

Description

In Eclipse Jetty 9.4.6.v20170531 to 9.4.36.v20210114 (inclusive), 10.0.0, and 11.0.0 when Jetty handles a request containing multiple Accept headers with a large number of “quality” (i.e. q) parameters, the server may enter a denial of service (DoS) state due to high CPU usage processing those quality values, resulting in minutes of CPU time exhausted processing those quality values.

CWE-407 CWE-400Resource Exhaustion

How to fix

Remediation Available

jetty9Debian

Fixed in:9.4.38-1CVE-2020-27223

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 VectorAdjacent

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

77.95%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Vendor Advisory1

bugs.eclipse.org

Third-Party Advisory1

github.com

Other references48

Related Vulnerabilities

Other CWE-407 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-36021	Medium	5.5	60%	-	Fix
CVE-2021-33582	High	7.5	3.1%	-	Fix
CVE-2024-43485	High	7.5	3.1%	-	Fix
CVE-2024-43484	High	7.5	2.9%	-	Fix
CVE-2016-10396	High	7.5	2.9%	-	-
CVE-2024-43483	High	7.5	2.9%	-	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 2025-08-20.