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TI-2021-19705 Aliases CVE-2021-43943GHSA-v4f6-rc45-6c46

Cross-site scripting in Atlassian Jira Service Management Server

Priority LOW 22CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
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. Impact type from CWE-79.

Summary

Affected versions of Atlassian Jira Service Management Server and Data Center allow attackers with administrator privileges to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability in the "Object Schema" field of /secure/admin/InsightDefaultCustomFieldConfig.jspa. The affected versions are before version 4.21.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00428 37th percentileScored 2026-11-07
Fix Fixed Jira Service Management Server (Atlassian): 4.21.0Jira Service Management Data Center (Atlassian): 4.21.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AtlassianJira Service Management Serverbefore 4.21.04.21.0Patch availableCNA
AtlassianJira Service Management Data Centerbefore 4.21.04.21.0Patch availableCNA
  • Jira Service Management Server VendorAtlassian Affected before 4.21.0 Fixed in 4.21.0 Patch available CNA
  • Jira Service Management Data Center VendorAtlassian Affected before 4.21.0 Fixed in 4.21.0 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:data_center:*:*:*before 4.21.0VulnerableAtlassian
cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:server:*:*:*before 4.21.0VulnerableAtlassian
  • cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:data_center:*:*:* Versions before 4.21.0 Vulnerable ·Atlassian
  • cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:server:*:*:* Versions before 4.21.0 Vulnerable ·Atlassian

Remediation

  • Fix · CNA Jira Service Management Server (Atlassian) Fixed in 4.21.0
  • Fix · CNA Jira Service Management Data Center (Atlassian) Fixed in 4.21.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43943
  2. 2026-10-03 Alias added: GHSA-v4f6-rc45-6c46

References

Patch 1

  • TI-2026-67904 Arbitrary file access in Atlassian Data Center products KEVCVSS 4.0CRITICAL 9.3
  • TI-2022-00460 Improper authentication in Atlassian Jira Core Server CVSS 3.1CRITICAL 9.8
  • TI-2024-14399 Code injection in Atlassian Confluence Data Center CVSS 3.1HIGH 8.8
  • TI-2020-18559 Missing authorization in Atlassian Jira Data Center CVSS 3.1CRITICAL 9.8
  • TI-2022-09597 Server-side request forgery in Atlassian Jira Core Server CVSS 3.1MEDIUM 6.5
  • TI-2019-10436 initDocumentParser in xml/XMLSchedulingDataProcessor.java in Terracotta Quartz Scheduler… CVSS 3.1CRITICAL 9.8
See all 16 →

Sources

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