What is the CVSS score of CVE-2021-28165?

CVE-2021-28165 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 53.9%.

Is there a public PoC exploit available for CVE-2021-28165?

Yes, a public proof-of-concept exploit is available for CVE-2021-28165. Prioritise patching immediately. EPSS: 53.9%.

Is there a patch available for CVE-2021-28165?

Yes, a patch is available for CVE-2021-28165. Update the affected software to the latest version immediately.

Jetty CVE-2021-28165

HIGH

Uncontrolled Resource Consumption (CWE-400)

2021-04-01 emo@eclipse.org

Denial Of Service Oracle Jenkins E Series Santricity Os Controller E Series Santricity Web Services Jetty Ontap Tools Snapcenter Communications Services Gatekeeper Communications Cloud Native Core Policy Vasa Provider For Clustered Data Ontap Cloud Manager Autovue For Agile Product Lifecycle Management Communications Element Manager Communications Session Report Manager Communications Session Route Manager Storage Replication Adapter For Clustered Data Ontap Rest Data Services Santricity Web Services Proxy E Series Performance Analyzer Santricity Cloud Connector Siebel Core Automation E Series Santricity Storage Netapp Eclipse

7.5

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-400 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V2 - Validation and Business Logic Resource consumption limits MITRE ATT&CK 1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	A remote attacker could cause denial of service by exhausting system resources by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Week Schedule remediation this week. Why: HIGH severity + EPSS > 10%.

Patch available 53.9% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

In Eclipse Jetty 7.2.2 to 9.4.38, 10.0.0.alpha0 to 10.0.1, and 11.0.0.alpha0 to 11.0.1, CPU usage can reach 100% upon receiving a large invalid TLS frame. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.

Affected Packages

maven org.eclipse.jetty:jetty-server fix: 9.4.39, 10.0.2, 11.0.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. In Eclipse Jetty 7.2.2 to 9.4.38, 10.0.0.alpha0 to 10.0.1, and 11.0.0.alpha0 to 11.0.1, CPU usage can reach 100% upon receiving a large invalid TLS frame. Affected products include: Eclipse Jetty, Oracle Autovue For Agile Product Lifecycle Management, Oracle Communications Cloud Native Core Policy, Oracle Communications Element Manager, Oracle Communications Services Gatekeeper.

Know when Jetty gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

In Eclipse Jetty 7.2.2 to 9.4.38, 10.0.0.alpha0 to 10.0.1, and 11.0.0.alpha0 to 11.0.1, CPU usage can reach 100% upon receiving a large invalid TLS frame.

Threat Intelligence Overview

EPSS Score

53.9%

Top 1% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 53.9%

Patch available Yes

Active threat Yes

Deciding rule

HIGH severity + EPSS > 10%

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

112

Low Medium High Critical

KEV: 0

EPSS: +54

CVSS: +38

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:autovue_for_agile_product_lifecycle_management:21.0.2:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_element_manager:8.2.2:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_services_gatekeeper:7.0:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:rest_data_services:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:siebel_core_-_automation:*:*:*:*:*:*:*:*

cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*

cpe:2.3:a:jenkins:jenkins:*:*:*:*:*:*:*:*

cpe:2.3:a:netapp:cloud_manager:*:*:*:*:*:*:*:*

cpe:2.3:a:netapp:e-series_performance_analyzer:*:*:*:*:*:*:*:*

cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*

cpe:2.3:a:netapp:e-series_santricity_storage:*:*:*:*:*:vcenter:*:*

cpe:2.3:a:netapp:e-series_santricity_web_services:*:*:*:*:*:web_services_proxy:*:*

cpe:2.3:a:netapp:ontap_tools:*:*:*:*:*:vmware_vsphere:*:*

cpe:2.3:a:netapp:santricity_cloud_connector:-:*:*:*:*:*:*:*

+ 4 more

More in Jetty

View all

CVE-2023-44487 HIGH Act Now POC

7.5 Oct 10

Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour

CVE-2015-2080 HIGH Act Now POC

7.5 Oct 07

The exception handling code in Eclipse Jetty before 9.2.9.v20150224 allows remote attackers to obtain sensitive informat

CVE-2023-36478 HIGH This Week POC

7.5 Oct 10

Eclipse Jetty provides a web server and servlet container. Rated high severity (CVSS 7.5), this vulnerability is remotel

CVE-2022-2191 HIGH This Week POC

7.5 Jul 07

In Eclipse Jetty versions 10.0.0 thru 10.0.9, and 11.0.0 thru 11.0.9 versions, SslConnection does not release ByteBuffer

CVE-2020-27216 HIGH This Week POC

7.0 Oct 23

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.beta

CVE-2016-4800 CRITICAL Act Now

9.8 Apr 13

The path normalization mechanism in PathResource class in Eclipse Jetty 9.3.x before 9.3.9 on Windows allows remote atta

CVE-2026-19863 CRITICAL Act Now

9.3 Oct 15

Protected resources in Eclipse Jetty deployments that enable the EthereumAuthenticator can be reached without authentica

CVE-2024-6763 MEDIUM This Month POC

5.3 Oct 14

Eclipse Jetty is a lightweight, highly scalable, Java-based web server and Servlet engine . Rated medium severity (CVSS

CVE-2021-34429 MEDIUM This Month POC

5.3 Jul 15

For 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 characte

CVE-2021-28169 MEDIUM This Month POC

5.3 Jun 09

For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, it is possible for requests to the ConcatServlet with a doub

CVE-2021-28164 MEDIUM This Month POC

5.3 Apr 01

In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contai

CVE-2018-12538 HIGH This Week

8.8 Jun 22

In Eclipse Jetty versions 9.4.0 through 9.4.8, when using the optional Jetty provided FileSessionDataStore for persisten

Same weakness CWE-400 – Uncontrolled Resource Consumption

View all

CVE-2021-21341 HIGH POC

7.5

CVE-2022-29885 HIGH POC

7.5

CVE-2026-45498 HIGH POC

7.5

CVE-2016-8610 HIGH

7.5

CVE-2026-28318 HIGH POC

7.5

CVE-2023-38180 HIGH

7.5

CVE-2025-26673 HIGH

7.5

Same technique Denial Of Service

View all

CVE-2015-5119 CRITICAL POC

9.8

CVE-2011-2462 CRITICAL POC

9.8

CVE-2011-0611 HIGH POC

8.8

CVE-2012-1889 HIGH POC

8.8

CVE-2012-0507 CRITICAL POC

9.8

CVE-2014-1761 HIGH POC

7.8

CVE-2015-5122 CRITICAL POC

9.8

CVE-2011-0609 HIGH POC

7.8

References

Advisories & patches

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back