Skip to content
VulniPulse
Low3.7Atlassian

Low [CVE-2021-26076] The jira.editor.user.mode cookie set by the Jira Editor Plugin in Jira Server and Data Center before version 8.5.12, from…

This low-severity Atlassian advisory covers CVE-2021-26076 affecting Jira.

CVE-2021-26076 Published Apr 15, 2021Updated by vendor Jun 17, 2026
Affected products & platforms
AtlassianJira
Open vendor advisory

Android app · Google Play

Monitor future Atlassian CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

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.

Affected versions
  • 8.6.0
  • 8.14.0

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • 8.5.12
  • 8.13.4
  • 8.15.0

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

Upgrade to a fixed release: 8.5.12, 8.13.4, 8.15.0. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.