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TI-2021-08028 Aliases CVE-2021-26076GHSA-878x-rm8q-c4xm

The jira.editor.user.mode cookie set by the Jira Editor Plugin in Jira Server and Data…

Priority LOW 20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

The jira.editor.user.mode cookie set by the Jira Editor Plugin in Jira Server and Data Center before version 8.5.12, from version 8.6.0 before version 8.13.4, and from version 8.14.0 before version 8.15.0 allows remote anonymous attackers who can perform an attacker in the middle attack to learn which mode a user is editing in due to the cookie not being set with a secure attribute if Jira was configured to use https.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01317 70th percentileScored 2026-11-07
Fix Fixed Jira Server (Atlassian): 8.5.12, 8.13.4, 8.15.0Jira Data Center (Atlassian): 8.5.12, 8.13.4, 8.15.0

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 Serverbefore 8.5.12; 8.6.0 and later; before 8.13.4; 8.14.0 and later; before 8.15.08.5.12, 8.13.4, 8.15.0Patch availableCNA
AtlassianJira Data Centerbefore 8.5.12; 8.6.0 and later; before 8.13.4; 8.14.0 and later; before 8.15.08.5.12, 8.13.4, 8.15.0Patch availableCNA
  • Jira Server VendorAtlassian Affected before 8.5.12; 8.6.0 and later; before 8.13.4; 8.14.0 and later; before 8.15.0 Fixed in 8.5.12, 8.13.4, 8.15.0 Patch available CNA
  • Jira Data Center VendorAtlassian Affected before 8.5.12; 8.6.0 and later; before 8.13.4; 8.14.0 and later; before 8.15.0 Fixed in 8.5.12, 8.13.4, 8.15.0 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:*before 8.5.12VulnerableAtlassian
cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*before 8.5.12VulnerableAtlassian
cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:*8.6.0 to before 8.13.4; 8.14.0 to before 8.15.1VulnerableAtlassian
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*8.6.0 to before 8.13.4; 8.14.0 to before 8.15.1VulnerableAtlassian
  • cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* Versions before 8.5.12 Vulnerable ·Atlassian
  • cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:* Versions before 8.5.12 Vulnerable ·Atlassian
  • cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* Versions 8.6.0 to before 8.13.4; 8.14.0 to before 8.15.1 Vulnerable ·Atlassian
  • cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:* Versions 8.6.0 to before 8.13.4; 8.14.0 to before 8.15.1 Vulnerable ·Atlassian

Remediation

  • Fix · CNA Jira Server (Atlassian) Fixed in 8.5.12, 8.13.4, 8.15.0
  • Fix · CNA Jira Data Center (Atlassian) Fixed in 8.5.12, 8.13.4, 8.15.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-26076
  2. 2026-10-03 Alias added: GHSA-878x-rm8q-c4xm

References

Patch 1

  • TI-2020-18587 Incorrect authorization in Atlassian Jira Server CVSS 3.1MEDIUM 5.3
  • TI-2020-11107 Information disclosure in Atlassian Jira Server CVSS 3.1MEDIUM 5.3
  • TI-2021-16503 Insufficient session expiration in Atlassian Jira Server CVSS 3.1HIGH 7.5
  • TI-2017-13320 Code injection in Atlassian Jira Server CVSS 3.1HIGH 8.8
  • TI-2020-17687 Path traversal in Atlassian Jira Server CVSS 3.1MEDIUM 5.3
  • TI-2021-16512 Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote… CVSS 3.1HIGH 7.5
See all 37 →

Sources

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