CVE-2021-26078

Name: CVE-2021-26078
Creator: NVD / NIST
Published: 2021-06-07T23:15:08.057+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 3.84%

Last modified Jun 17, 2026

CVE-2021-26078 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 3.84% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

3.84%

88.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Atlassian	Data Center	< 8.5.14
Atlassian	Data Center	>= 8.6.0, < 8.13.6
Atlassian	Data Center	>= 8.14.0, < 8.16.1
Atlassian	Jira	< 8.5.14
Atlassian	Jira Server	>= 8.6.0, < 8.13.6
Atlassian	Jira Server	>= 8.14.0, < 8.16.1

References

http://packetstormsecurity.com/files/163289/Atlassian-Jira-Server-Data-Center-8.16.0-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://jira.atlassian.com/browse/JRASERVER-72392Patch, Vendor Advisory
http://packetstormsecurity.com/files/163289/Atlassian-Jira-Server-Data-Center-8.16.0-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://jira.atlassian.com/browse/JRASERVER-72392Patch, Vendor Advisory

Timeline

Published: Jun 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26078?

How severe is CVE-2021-26078?

CVE-2021-26078 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 3.84% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26078?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26078?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST