CVE-2021-28163

Exp

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.

Published: 2021-04-01 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-28163 is rated Exploit Available (50/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.17%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-28163

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-28163

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 1.96% 0.17% -1.79%
2 2025-11-18 0.15% 1.96% +1.81%
3 2025-08-20 — 0.15% —

Full EPSS history (31 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-28163

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.7 3.1 LOW
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.2 1.4 [email protected]
2.7 3.1 LOW
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.2 1.4 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2021-28163

GitHub Security Advisory for CVE-2021-28163

OS Trackers for CVE-2021-28163

vendor priority summary link
debian not yet assigned CVE-2021-28163 not yet assigned priority: Debian including 1 source packages (jetty9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-28163
redhat medium — https://access.redhat.com/security/cve/CVE-2021-28163
suse medium CVE-2021-28163 severity moderate: SUSE including 57 source package names (jetty-annotations-9.4.42-3.9.1, jetty-annotations-9.4.43-1.2, …), 185 product×package rows across 14 product lines (SUSE Linux Enterprise Module for Development Tools 15 SP2, SUSE Linux Enterprise Module for Development Tools 15 SP3, … (14 product lines)): Fixed 185. https://www.suse.com/security/cve/CVE-2021-28163/
ubuntu medium CVE-2021-28163 medium priority: Ubuntu including 1 source packages (equinox-bundles), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 7, ignored 5, needs-triage 4. https://ubuntu.com/security/CVE-2021-28163

Affected software / configurations for CVE-2021-28163

Vendor Product Version Raw CPE
eclipse jetty >= 9.4.32, < 9.4.39 cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:*
eclipse jetty 10.0.0 cpe:2.3:a:eclipse:jetty:10.0.0:beta2:*:*:*:*:*:*
eclipse jetty 10.0.1 cpe:2.3:a:eclipse:jetty:10.0.1:*:*:*:*:*:*:*
eclipse jetty 11.0.0 cpe:2.3:a:eclipse:jetty:11.0.0:-:*:*:*:*:*:*
eclipse jetty 11.0.0 cpe:2.3:a:eclipse:jetty:11.0.0:beta2:*:*:*:*:*:*
eclipse jetty 11.0.0 cpe:2.3:a:eclipse:jetty:11.0.0:beta3:*:*:*:*:*:*
eclipse jetty 11.0.1 cpe:2.3:a:eclipse:jetty:11.0.1:*:*:*:*:*:*:*
fedoraproject fedora 32 cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
fedoraproject fedora 33 cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
fedoraproject fedora 34 cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
apache ignite < 2.1.1 cpe:2.3:a:apache:ignite:*:*:*:*:*:*:*:*
apache solr 8.8.1 cpe:2.3:a:apache:solr:8.8.1:*:*:*:*:*:*:*
netapp cloud_manager — cpe:2.3:a:netapp:cloud_manager:-:*:*:*:*:*:*:*
netapp e-series_performance_analyzer — cpe:2.3:a:netapp:e-series_performance_analyzer:-:*:*:*:*:*:*:*
netapp e-series_santricity_os_controller >= 11.0.0, <= 11.70.1 cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*
netapp e-series_santricity_web_services — cpe:2.3:a:netapp:e-series_santricity_web_services:-:*:*:*:*:web_services_proxy:*:*
netapp element_plug-in_for_vcenter_server — cpe:2.3:a:netapp:element_plug-in_for_vcenter_server:-:*:*:*:*:*:*:*
netapp santricity_cloud_connector — cpe:2.3:a:netapp:santricity_cloud_connector:-:*:*:*:*:*:*:*
netapp snapcenter — cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
netapp snapcenter_plug-in — cpe:2.3:a:netapp:snapcenter_plug-in:-:*:*:*:*:vmware_vsphere:*:*
netapp storage_replication_adapter_for_clustered_data_ontap >= 9.6 cpe:2.3:a:netapp:storage_replication_adapter_for_clustered_data_ontap:*:*:*:*:*:vmware_vsphere:*:*
netapp vasa_provider_for_clustered_data_ontap >= 9.6 cpe:2.3:a:netapp:vasa_provider_for_clustered_data_ontap:*:*:*:*:*:*:*:*
netapp virtual_storage_console >= 9.6 cpe:2.3:a:netapp:virtual_storage_console:*:*:*:*:*:vmware_vsphere:*:*
oracle autovue_for_agile_product_lifecycle_management 21.0.2 cpe:2.3:a:oracle:autovue_for_agile_product_lifecycle_management:21.0.2:*:*:*:*:*:*:*
oracle banking_apis 20.1 cpe:2.3:a:oracle:banking_apis:20.1:*:*:*:*:*:*:*
oracle banking_apis 21.1 cpe:2.3:a:oracle:banking_apis:21.1:*:*:*:*:*:*:*
oracle banking_digital_experience 20.1 cpe:2.3:a:oracle:banking_digital_experience:20.1:*:*:*:*:*:*:*
oracle banking_digital_experience 21.1 cpe:2.3:a:oracle:banking_digital_experience:21.1:*:*:*:*:*:*:*
oracle communications_element_manager 8.2.2 cpe:2.3:a:oracle:communications_element_manager:8.2.2:*:*:*:*:*:*:*
oracle communications_services_gatekeeper 7.0 cpe:2.3:a:oracle:communications_services_gatekeeper:7.0:*:*:*:*:*:*:*
oracle communications_session_report_manager >= 8.0.0, <= 8.2.4.0 cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:*
oracle communications_session_route_manager >= 8.0.0, <= 8.2.4.0 cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:*
oracle siebel_core_-_automation <= 21.9 cpe:2.3:a:oracle:siebel_core_-_automation:*:*:*:*:*:*:*:*

References for CVE-2021-28163

URL Tags
https://github.com/eclipse/jetty.project/security/advisories/GHSA-j6qj-j888-vvgq Exploit Third Party Advisory
https://lists.apache.org/thread.html/r0841b06b48324cfc81325de3c05a92e53f997185f9d71ff47734d961%40%3Cissues.solr.apache.org%3E
https://lists.apache.org/thread.html/r111f1ce28b133a8090ca4f809a1bdf18a777426fc058dc3a16c39c66%40%3Cissues.solr.apache.org%3E
https://lists.apache.org/thread.html/r2ea2f0541121f17e470a0184843720046c59d4bde6d42bf5ca6fad81%40%3Cissues.solr.apache.org%3E
https://lists.apache.org/thread.html/r4a66bfbf62281e31bc1345ebecbfd96f35199eecd77bfe4e903e906f%40%3Cissues.ignite.apache.org%3E
https://lists.apache.org/thread.html/r4b1fef117bccc7f5fd4c45fd2cabc26838df823fe5ca94bc42a4fd46%40%3Cissues.ignite.apache.org%3E
https://lists.apache.org/thread.html/r5b3693da7ecb8a75c0e930b4ca26a5f97aa0207d9dae4aa8cc65fe6b%40%3Cissues.ignite.apache.org%3E
https://lists.apache.org/thread.html/r67c4f90658fde875521c949448c54c98517beecdc7f618f902c620ec%40%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/r6ac9e263129328c0db9940d72b4a6062e703c58918dd34bd22cdf8dd%40%3Cissues.ignite.apache.org%3E
https://lists.apache.org/thread.html/r780c3c210a05c5bf7b4671303f46afc3fe56758e92864e1a5f0590d0%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/r787e47297a614b05b99d01b04c8a1d6c0cafb480c9cb7c624a6b8fc3%40%3Cissues.solr.apache.org%3E
https://lists.apache.org/thread.html/r8a1a332899a1f92c8118b0895b144b27a78e3f25b9d58a34dd5eb084%40%3Cnotifications.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/r9974f64723875052e02787b2a5eda689ac5247c71b827d455e5dc9a6%40%3Cissues.solr.apache.org%3E
https://lists.apache.org/thread.html/rbc075a4ac85e7a8e47420b7383f16ffa0af3b792b8423584735f369f%40%3Cissues.solr.apache.org%3E
https://lists.apache.org/thread.html/rbefa055282d52d6b58d29a79fbb0be65ab0a38d25f00bd29eaf5e6fd%40%3Cnotifications.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/rd0471252aeb3384c3cfa6d131374646d4641b80dd313e7b476c47a9c%40%3Cissues.solr.apache.org%3E
https://lists.apache.org/thread.html/rd7c8fb305a8637480dc943ba08424c8992dccad018cd1405eb2afe0e%40%3Cdev.ignite.apache.org%3E
https://lists.apache.org/thread.html/rddbb4f8d5db23265bb63d14ef4b3723b438abc1589f877db11d35450%40%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/rf36f1114e84a3379b20587063686148e2d5a39abc0b8a66ff2a9087a%40%3Cissues.zookeeper.apache.org%3E
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5CXQIJVYU4R3JL6LSPXQ5GIV7WLLA7PI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GGNKXBNRRCZTGGXPIX3VBWCF2SAM3DWS/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HAAKW7S66TECXGJZWB3ZFGOQAK34IYHF/
https://security.netapp.com/advisory/ntap-20210611-0006/ Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html Not Applicable Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html Patch Third Party Advisory
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