How severe is CVE-2021-28163?

CVE-2021-28163 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-28163 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28163?

CVE-2021-28163 primarily affects Eclipse Jetty. In total, 33 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-28163?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-28163 published?

CVE-2021-28163 was published on 2021-04-01 and last updated on 2026-06-17.

CVE-2021-28163

CVE-2021-28163 is a low-severity vulnerability in Eclipse Jetty with a CVSS 3.x base score of 2.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-59.

Key facts

Severity: Low (CVSS 3.x base score 2.7)
CVSS v2: 4.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Eclipse Jetty
Published: 2021-04-01
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-28163?: 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.
How severe is CVE-2021-28163?: CVE-2021-28163 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-28163 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28163?: CVE-2021-28163 primarily affects Eclipse Jetty. In total, 33 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-28163?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28163 published?: CVE-2021-28163 was published on 2021-04-01 and last updated on 2026-06-17.

References

Affected products (33)

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:*:*
cpe:2.3:a:netapp:storage_replication_adapter_for_clustered_data_ontap:*:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:vasa_provider_for_clustered_data_ontap:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:virtual_storage_console:*:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:oracle:autovue_for_agile_product_lifecycle_management:21.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_apis:20.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_apis:21.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_digital_experience:20.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_digital_experience:21.1:*:*:*:*:*:*:*
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:siebel_core_-_automation:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

39.104.63.170 (ipv4-addr)