What’s Vulnerable › Vulnerabilities

CVE-2021-26078

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-07 · updated 2026-06-17
• Weakness: CWE-79

Description

The number range searcher component in Jira Server and Jira Data Center before version 8.5.14, from version 8.6.0 before version 8.13.6, and from version 8.14.0 before version 8.16.1 allows remote attackers inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability.

Affected products

• Atlassian Data Center: before 8.5.14; from 8.6.0 before 8.13.6; from 8.14.0 before 8.16.1 — fixed in 8.13.6, 8.16.1, 8.5.14
• Atlassian Jira: before 8.5.14 — fixed in 8.5.14
• Atlassian Jira: from 8.6.0 before 8.13.6; from 8.14.0 before 8.16.1 — fixed in 8.13.6, 8.16.1

How to fix

Upgrade to a fixed version: Atlassian Data Center 8.13.6, 8.16.1, 8.5.14; Atlassian Jira 8.5.14; Atlassian Jira 8.13.6, 8.16.1. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/163289/Atlassian-Jira-Server-Data-Center-8.16.0-Cross-Site-Scripting.html
• https://jira.atlassian.com/browse/JRASERVER-72392
• http://packetstormsecurity.com/files/163289/Atlassian-Jira-Server-Data-Center-8.16.0-Cross-Site-Scripting.html
• https://jira.atlassian.com/browse/JRASERVER-72392

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