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Fencer Vulns
low 2.7

CVE-2021-28163 json

Directory exposure in jetty

published 2021-04-01 5 y ago modified 2026-09-08 2 mo ago also BIT-solr-2021-28163 , EUVD-2021-0837 , GHSA-j6qj-j888-vvgq

cvss
2.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.2%
EPSS 4.2% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.eclipse.jetty:jetty-deploy 9.4.39, 10.0.2, 11.0.2
  • bitnami solr 8.8.2
  • eclipse jetty 9.4.39
  • apache ignite 2.1.1
  • jetty9 Debian 14, Debian 13, Debian 12 9.4.39-1

debian advisories DEBIAN-CVE-2021-28163

  • runc openshift 4.7 1.0.0-95.rhaos4.8.gitcd80260.el7
  • runc openshift 4.7 1.0.0-95.rhaos4.8.gitcd80260.el8
  • jenkins openshift 4.7 2.277.3.1620393611-1.el8
  • cri-tools openshift 4.7 1.20.0-2.el7
  • cri-tools openshift 4.7 1.20.0-2.el8
  • rh-eclipse-jetty devtools 2021 9.4.40-1.1.el7_9
  • rh-eclipse-jetty-io devtools 2021 9.4.40-1.1.el7_9
  • rh-eclipse-jetty-jmx devtools 2021 9.4.40-1.1.el7_9

red hat advisories RHSA-2021:1551RHSA-2021:1509

  • jetty-minimal SLE Module for Development Tools 15 SP3, SLE Module for Development Tools 15 SP2 9.4.42-3.9.1

suse advisories SUSE-SU-2021:2005-1

  • jetty-minimal openSUSE Leap 15.3 9.4.42-3.9.1
  • jetty-websocket openSUSE Leap 15.3 9.4.42-3.9.1

opensuse advisories openSUSE-SU-2021:2005-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-28163 updated cvss 2.7

jetty: Symlink directory exposes webapp directory contents

  • Red Hat Enterprise Linux 7 jetty-io, jetty-ant, jetty-jmx, jetty-jsp, jetty-xml, jetty-http, +30 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 jetty-io, jetty-http, jetty-util, jetty-server, jetty-servlet, jetty-security, +1 more
    affected: no fix planned “Will not fix”
  • Red Hat Integration Camel Quarkus 1 jetty Red Hat Integration Service Registry jetty-server
    affected: no fix available
  • Red Hat JBoss A-MQ 6 jetty-server Red Hat JBoss Fuse 6 jetty, jetty-server
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 3.11 jenkins
    affected: no fix available
  • Red Hat OpenShift Container Platform 4 openshift4/ose-metering-hive, openshift4/ose-metering-hadoop, openshift4/ose-metering-presto Red Hat OpenStack Platform 13 (Queens) opendaylight
    affected: no fix planned “Will not fix”
  • Red Hat AMQ 7.8.2
    fixed: vendor fix RHSA-2021:2689
  • Red Hat AMQ 7.9.0
    fixed: vendor fix RHSA-2021:3700
show 8 more
  • Red Hat AMQ Streams 1.6.4
    fixed: vendor fix RHSA-2021:1560
  • Red Hat AMQ Streams 1.8.0
    fixed: vendor fix RHSA-2021:3225
  • Red Hat Developer Tools for Red Hat Enterprise Linux Server (v. 7) rh-eclipse-jetty 9.4.40-1.1.el7_9, rh-eclipse-jetty-io 9.4.40-1.1.el7_9, rh-eclipse-jetty-jmx 9.4.40-1.1.el7_9, rh-eclipse-jetty-xml 9.4.40-1.1.el7_9, rh-eclipse-jetty-http 9.4.40-1.1.el7_9, rh-eclipse-jetty-jaas 9.4.40-1.1.el7_9, +9 more Red Hat Developer Tools for Red Hat Enterprise Linux Workstation (v. 7) rh-eclipse-jetty 9.4.40-1.1.el7_9, rh-eclipse-jetty-io 9.4.40-1.1.el7_9, rh-eclipse-jetty-jmx 9.4.40-1.1.el7_9, rh-eclipse-jetty-xml 9.4.40-1.1.el7_9, rh-eclipse-jetty-http 9.4.40-1.1.el7_9, rh-eclipse-jetty-jaas 9.4.40-1.1.el7_9, +9 more
    fixed: vendor fix RHSA-2021:1509
  • Red Hat Fuse 7.10
    fixed: vendor fix RHSA-2021:5134
  • Red Hat Integration Camel Quarkus 2
    fixed: vendor fix RHSA-2021:4767
  • Red Hat OpenShift Container Platform 4.7 jenkins 2.277.3.1620393611-1.el8, runc 1.0.0-95.rhaos4.8.gitcd80260.el7, runc 1.0.0-95.rhaos4.8.gitcd80260.el8
    fixed: vendor fix RHSA-2021:1551
  • Red Hat RHAF Camel-K 1.8
    fixed: vendor fix RHSA-2022:6407
  • Red Hat OpenShift Container Platform 4.7 cri-tools 1.20.0-2.el7, cri-tools 1.20.0-2.el8, cri-o 1.20.2-11.rhaos4.7.git704b03d.el7, cri-o 1.20.2-11.rhaos4.7.git704b03d.el8, ignition 2.9.0-3.rhaos4.7.git1d56dc8.el8, openshift 4.7.0-202105111743.p0.git.75370d3.el7, +21 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.18% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/eclipse/jetty.project/security/advisories/GHSA-j6qj-j888-vvgq referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
GitHub 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:P/I:N/A:N
OSV 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven org.eclipse.jetty:jetty-deploy
>=9.4.32, <9.4.39
>=10.0.0, <10.0.2
>=11.0.0, <11.0.2
9.4.39
10.0.2
11.0.2
bitnami solr
>=8.8.1, <8.8.2
8.8.2

Affected products

  • The Eclipse Foundation Eclipse Jetty

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.