What is the CVSS score of CVE-2021-28163?

CVE-2021-28163 has a CVSS 3.1 base score of 2.7 (Low). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 4.2%.

Is there a public PoC exploit available for CVE-2021-28163?

Yes, a public proof-of-concept exploit is available for CVE-2021-28163. Prioritise patching immediately. EPSS: 4.2%.

Is there a patch available for CVE-2021-28163?

Yes, a patch is available for CVE-2021-28163. Update the affected software to the latest version immediately.

Jetty CVE-2021-28163

LOW

Information Exposure (CWE-200)

2021-04-01 emo@eclipse.org

Apache Information Disclosure Oracle E Series Santricity Os Controller E Series Santricity Web Services Fedora Jetty Solr Ignite Snapcenter Banking Digital Experience Communications Services Gatekeeper Vasa Provider For Clustered Data Ontap Virtual Storage Console 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 E Series Performance Analyzer Santricity Cloud Connector Element Plug In For Vcenter Server Banking Apis Snapcenter Plug In Siebel Core Automation Netapp Eclipse Fedoraproject

2.7

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-200 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V14 - Data Protection Data exposure prevention MITRE ATT&CK 2 techniques across 2 tactics: Collection, Discovery 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 2.7 (LOW). Attack characteristics: network attack vector, low complexity, high privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	A remote attacker could access sensitive data that should not be disclosed by sending crafted requests to the affected application.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).

Patch available 4.2% exploitation probability (EPSS)

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AnalysisAI

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, the contents of the webapps directory is deployed as a. Rated low severity (CVSS 2.7), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Minimize information in error messages, implement proper access controls, encrypt sensitive data at rest and in transit.

Affected Packages

maven org.eclipse.jetty:jetty-deploy 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 Exposure of Sensitive Information (CWE-200), which allows attackers to access sensitive data that should not be disclosed. 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, the contents of the webapps directory is deployed as a static webapp, inadvertently serving the webapps themselves and anything else that might be in that directory. Affected products include: Eclipse Jetty, Fedoraproject Fedora, Apache Ignite, Apache Solr, Netapp Cloud Manager.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 2.7 LOW

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

DescriptionNVD

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, the contents of the webapps directory is deployed as a static webapp, inadvertently serving the webapps themselves and anything else that might be in that directory.

Threat Intelligence Overview

EPSS Score

4.2%

Top 10% 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 LOW

CISA KEV No

Public POC Yes

EPSS 4.2%

Patch available Yes

Active threat No

Deciding rule

LOW severity (CVSS 0.1-3.9)

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

Human Impact· derived

Low

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +4

CVSS: +14

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

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

cpe:2.3:a:eclipse:jetty:10.0.0:beta2:*:*:*:*:*:*

cpe:2.3:a:eclipse:jetty:10.0.1:*:*:*:*:*:*:*

cpe:2.3:a:eclipse:jetty:11.0.0:-:*:*:*:*:*:*

cpe:2.3:a:eclipse:jetty:11.0.0:beta2:*:*:*:*:*:*

cpe:2.3:a:eclipse:jetty:11.0.0:beta3:*:*:*:*:*:*

cpe:2.3:a:eclipse:jetty:11.0.1:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

cpe:2.3:a:apache:ignite:*:*:*:*:*:*:*:*

cpe:2.3:a:apache:solr:8.8.1:*:*:*:*:*:*:*

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_web_services:-:*:*:*:*:web_services_proxy:*:*

cpe:2.3:a:netapp:element_plug-in_for_vcenter_server:-:*:*:*:*:*:*:*

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

cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*

cpe:2.3:a:netapp:snapcenter_plug-in:-:*:*:*:*:vmware_vsphere:*:*

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