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TI-2021-04683 Aliases CVE-2021-21603GHSA-98gq-6hxg-52r6

Cross-site scripting in Jenkins

Priority LOW 26CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.

Summary

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not escape notification bar response contents, resulting in a cross-site scripting (XSS) vulnerability.

Why it matters now

EPSS 0.01041 64th percentileScored 2026-11-07
Fix Fixed org.jenkins-ci.main:jenkins-core (Maven): 2.275Red Hat: 4 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
JenkinsJenkinsup to 2.274; up to LTS 2.263.1—No fix listedCNA
—org.jenkins-ci.main:jenkins-core (Maven)before 2.2752.275Patch availableGHSA-98gq-6hxg-52r6
—org.jenkins-ci.main:jenkins-core (Maven)2.263.2 to before 2.2752.275Patch availableGHSA-98gq-6hxg-52r6
  • Jenkins VendorJenkins Affected up to 2.274; up to LTS 2.263.1 Fixed in — No fix listed CNA
  • org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected before 2.275 Fixed in 2.275 Patch available GHSA-98gq-6hxg-52r6
  • org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected 2.263.2 to before 2.275 Fixed in 2.275 Patch available GHSA-98gq-6hxg-52r6

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*up to 2.263.1VulnerableJenkins
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*up to 2.274VulnerableJenkins
  • cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:* Versions up to 2.263.1 Vulnerable ·Jenkins
  • cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* Versions up to 2.274 Vulnerable ·Jenkins

Remediation

  • Fix · GHSA-98gq-6hxg-52r6 org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.275 Advisory →
  • Fix · GHSA-98gq-6hxg-52r6 org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.275 Advisory →

Red Hat 4 advisories

  • RHSA-2021:2437 Released 2021-07-27 · Red Hat rating Moderate
    OpenShift Container Platform 4.8.2 packages and security update
    • Red Hat OpenShift Container Platform 4.8 afterburn-5.0.0-1.rhaos4.8.el8, atomic-openshift-service-idler-4.8.0-202106281541.p0.git.39cfc66.assembly.stream.el8, butane-0.12.1-1.rhaos4.8.el8 +47
  • RHSA-2021:0637 Released 2021-03-03 · Red Hat rating Important
    OpenShift Container Platform 3.11.394 bug fix and security update
    • Red Hat OpenShift Container Platform 3.11 jenkins-2-plugins-3.11.1612862361-1.el7, jenkins-2.263.3.1612433584-1.el7, python-rsa-4.5-3.el7 +1
  • RHSA-2021:0429 Released 2021-03-03 · Red Hat rating Important
    OpenShift Container Platform 4.5.33 packages and security update
    • Red Hat OpenShift Container Platform 4.5 conmon-2:2.0.21-1.rhaos4.5.el7, conmon-2:2.0.21-1.rhaos4.5.el8, jenkins-2.263.3.1612434332-1.el7 +12
Show 1 more Red Hat advisories
  • RHSA-2021:0423 Released 2021-02-17 · Red Hat rating Important
    OpenShift Container Platform 4.6.17 security and packages update
    • Red Hat OpenShift Container Platform 4.6 jenkins-2.263.3.1612434510-1.el8

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 3.11Fixed RHSA-2021:0637
Red Hat OpenShift Container Platform 4.5Fixed RHSA-2021:0429
Red Hat OpenShift Container Platform 4.6Fixed RHSA-2021:0423
Red Hat OpenShift Container Platform 4.8Fixed RHSA-2021:2437
Not affected: 3 products
  • Red Hat Fuse 7
  • Red Hat OpenShift Container Platform 3.11
  • Red Hat OpenShift Container Platform 4.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21603
  2. 2026-10-03 Alias added: GHSA-98gq-6hxg-52r6

References

Advisory 2

Other 2

  • TI-2024-15885 Path traversal in Jenkins KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-14573 Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are vulnerable to an… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2015-04472 The Fingerprints pages in Jenkins before 1.638 and LTS before 1.625.2 might allow remote… KEVCVSS 3.1HIGH 7.5
  • TI-2016-07596 The remoting module in Jenkins before 2.32 and LTS before 2.19.3 allows remote attackers… CVSS 3.0CRITICAL 9.8
See all 293 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences