CVE-2021-26076

LOW

3.7

CVSS Score

Published: April 14, 2021 at 11:45 PM UTC

Updated: June 17, 2026 at 03:42 AM UTC

4 products affected across 1 vendorJira ServerJiraJira Data Center

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Severity

LOW3.7

Exploit prediction

EPSS 1%

SSVC

No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Data Center · Atlassianatlassian-app

95%

v < 8.5.12

Affected range stops below 8.5.12, so it looks safe — our inference, not a vendor statement

Jira · Atlassianatlassian-app

95%

v < 8.5.12

Affected range stops below 8.5.12, so it looks safe — our inference, not a vendor statement

Jira Data Center · Atlassianatlassian-app

95%

v ≥ 8.14.0v ≥ 8.6.0v < 8.13.4v < 8.15.0v < 8.5.128.14.0 ≤ v < 8.15.18.6.0 ≤ v < 8.13.48.14.0 8.6.0

Affected range stops below 8.13.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.15.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.15.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.5.12, so it looks safe — our inference, not a vendor statement

Jira Server · Atlassianatlassian-app

95%

v ≥ 8.14.0v ≥ 8.6.0v < 8.13.4v < 8.15.0v < 8.5.128.14.0 ≤ v < 8.15.18.6.0 ≤ v < 8.13.48.14.0 8.6.0

Affected range stops below 8.13.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.15.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.15.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.5.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://jira.atlassian.com/browse/JRASERVER-72252

References (1)

x_refsource_MISCPatchVendor Advisory

Source: [email protected]

https://jira.atlassian.com/browse/JRASERVER-72252

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.7LOW[email protected]

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-noinfo

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