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NVD / CVE Program· CNA eclipse

CVE-2020-27223: 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

Noroxi assessment

Priority: Plan (action score 44/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 78% (FIRST EPSS); higher than 99.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: jetty9 (Debian:10) 9.4.16-0+deb10u1; jetty9 (Debian:12) 9.4.38-1; org.eclipse.jetty:jetty-server (Maven) 10.0.1, 11.0.1, 9.4.37.
  • Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Add it to your regular patch cycle. Upgrade to jetty9 (Debian:10) 9.4.16-0+deb10u1; jetty9 (Debian:12) 9.4.38-1; org.eclipse.jetty:jetty-server (Maven) 10.0.1, 11.0.1, 9.4.37 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.3 · v3.1—Proof of concept Fix available
Published
Feb 26, 2021
Updated
Jun 16, 2026
EPSS
78.0% · 99th percentile

Report tools

JSON

Action score

44

Plan

Add it to your regular patch cycle.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
23 / 30 · 78.0%

CNA vs NVD score

NVD
5.3
CNA · eclipse
5.2
0.1 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-27223

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
eclipsejetty
apachenifi
apachespark
netappe-series santricity os controller
netappe-series santricity web services
netappelement plug-in for vcenter server
netapphci
netapphci management node
netappmanagement services for element software
netappsnap creator framework
netappsnapcenter
netappsnapmanager

and 4 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache nifi1.13.0
  • apache solr8.8.1
  • apache spark3.1.1
  • debian debian linux10.0
  • eclipse jetty9.4.7 and later · before 9.4.36
  • eclipse jetty10.0.0
  • eclipse jetty11.0.0
  • eclipse jetty9.4.36
  • eclipse jetty9.4.6
  • netapp e-series santricity os controller11.0.0 and later · up to 11.70.1 inclusive
  • netapp e-series santricity web servicesall versions
  • netapp element plug-in for vcenter serverall versions
  • netapp hciall versions
  • netapp hci management nodeall versions
  • netapp management services for element softwareall versions
  • netapp snap creator frameworkall versions
  • netapp snapcenterall versions
  • netapp snapmanagerall versions
  • netapp solidfireall versions
  • oracle rest data servicesbefore 20.4.3.050.1904

Versions reported by the vendor

Affected version ranges reported by the assigning authority (eclipse). Independent of NVD's CPE analysis and usually ahead of it.

  • The Eclipse Foundation Eclipse Jetty

    • 10.0.0, 11.0.0affected
    • 9.4.6.v20170531 and later · before unspecifiedaffected
    • unspecified and later · up to and including 9.4.36.v20210114affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10jetty9before 9.4.16-0+deb10u19.4.16-0+deb10u1
Debian:12jetty9before 9.4.38-19.4.38-1
Mavenorg.eclipse.jetty:jetty-serverfrom 10.0.0 · before 10.0.110.0.1
Mavenorg.eclipse.jetty:jetty-serverfrom 11.0.0 · before 11.0.111.0.1
Mavenorg.eclipse.jetty:jetty-serverfrom 9.4.6 · before 9.4.379.4.37
Red Hat:openshift:3.11::el7jenkinsbefore 0:2.289.1.1624365627-1.el70:2.289.1.1624365627-1.el7
Red Hat:openshift:3.11::el7jenkins-2-pluginsbefore 0:3.11.1624366838-1.el70:3.11.1624366838-1.el7
Red Hat:openshift:4.5::el7jenkinsbefore 0:2.277.3.1623846768-1.el70:2.277.3.1623846768-1.el7
Red Hat:openshift:4.5::el7jenkins-2-pluginsbefore 0:4.5.1623326336-1.el70:4.5.1623326336-1.el7
Red Hat:openshift:4.6::el8jenkinsbefore 0:2.277.3.1623853726-1.el80:2.277.3.1623853726-1.el8
SUSE:Linux Enterprise Module for Development Tools 15 SP2jetty-minimalbefore 9.4.38-3.6.29.4.38-3.6.2

Same product

eclipse: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-34429For Eclipse Jetty versions 9.4.37-9.4.42, 10.0.1-10.0.5 & 11.0.1-11.0.5, URIs can be crafted using some encoded characters to access the con
    60This week
  • CVE-2021-28164In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segm
    60This week
  • CVE-2015-2080The exception handling code in Eclipse Jetty before 9.2.9.v20150224 allows remote attackers to obtain sensitive information from process mem
    53Plan

Published before and after this one in the same product

  • ← EarlierCVE-2020-27216Oct 23, 2020 · In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like sys
    29Monitor
  • ← EarlierCVE-2020-27218Nov 27, 2020 · In Eclipse Jetty version 9.4.0.RC0 to 9.4.34.v20201102, 10.0.0.alpha0 to 10.0.0.beta2, and 11.0.0.alpha0 to 11.0.0.beta2, if GZIP request bo
    21Monitor
  • Later →CVE-2021-28163Apr 1, 2021 · In Eclipse Jetty 9.4.32 to 9.4.38, 10.0.0.beta2 to 10.0.1, and 11.0.0.beta2 to 11.0.1, if a user uses a webapps directory that is a symlink,
    11Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:jetty99.4.38-1 · Debian:12Package registry (OSV)
Maven:org.eclipse.jetty:jetty-server10.0.1Package registry (OSV)
Maven:org.eclipse.jetty:jetty-server11.0.1Package registry (OSV)
Maven:org.eclipse.jetty:jetty-server9.4.37Package registry (OSV)
red hat:jenkins0:2.277.3.1623846768-1.el7 · Red Hat:openshift:4.5::el7Package registry (OSV)
red hat:jenkins-2-plugins0:4.5.1623326336-1.el7 · Red Hat:openshift:4.5::el7Package registry (OSV)
suse:jetty-minimal9.4.38-3.6.2 · SUSE:Linux Enterprise Module for Development Tools 15 SP2Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:32021-03-19
Proof-of-concept repository on GitHubstars:02021-08-18

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+20 d
  3. TodayNov 10, 2026+2083 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-407 · Inefficient Algorithmic Complexity

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records