CVE-2018-20239

Name: CVE-2018-20239
Creator: NVD / NIST
Published: 2019-04-30T16:29:00.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 3.40%

Last modified Jun 17, 2026

CVE-2018-20239 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Application Links before version 5.0.11, from version 5.1.0 before 5.2.10, from version 5.3.0 before 5.3.6, from version 5.4.0 before 5.4.12, and from version 6.0.0 before 6.0.4 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the applinkStartingUrl parameter. The product is used as a plugin in various Atlassian products where the following are affected: Confluence before version 6.15.2, Crucible before version 4.7.0, Crowd before version 3.4.3, Fisheye before version 4.7.0, Jira before version 7.13.3 and 8.x before 8.1.0.. EPSS estimates a 3.40% chance of exploitation in the next 30 days.

Description

Application Links before version 5.0.11, from version 5.1.0 before 5.2.10, from version 5.3.0 before 5.3.6, from version 5.4.0 before 5.4.12, and from version 6.0.0 before 6.0.4 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the applinkStartingUrl parameter. The product is used as a plugin in various Atlassian products where the following are affected: Confluence before version 6.15.2, Crucible before version 4.7.0, Crowd before version 3.4.3, Fisheye before version 4.7.0, Jira before version 7.13.3 and 8.x before 8.1.0.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

3.40%

87.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Atlassian	Application Links	< 5.0.11
Atlassian	Application Links	>= 5.1.0, < 5.2.10
Atlassian	Application Links	>= 5.3.0, < 5.3.6
Atlassian	Application Links	>= 5.4.0, < 5.4.12
Atlassian	Application Links	>= 6.0.0, < 6.0.4
Atlassian	Confluence Data Center	< 6.15.2
Atlassian	Confluence Server	< 6.15.2
Atlassian	Crowd	< 3.4.3
Atlassian	Crucible	< 4.7.0
Atlassian	Fisheye	< 4.7.0
Atlassian	Jira Data Center	< 7.13.3
Atlassian	Jira Data Center	>= 8.0.0, < 8.1.0
Atlassian	Jira Server	< 7.13.3
Atlassian	Jira Server	>= 8.0.0, < 8.1.0

References

https://ecosystem.atlassian.net/browse/APL-1373Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-58208Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/CRUC-8379Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/CWD-5362Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/FE-7161Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/JRASERVER-68855Issue Tracking, Vendor Advisory
https://ecosystem.atlassian.net/browse/APL-1373Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-58208Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/CRUC-8379Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/CWD-5362Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/FE-7161Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/JRASERVER-68855Issue Tracking, Vendor Advisory

Timeline

Published: Apr 30, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20239?

How severe is CVE-2018-20239?

CVE-2018-20239 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 3.40% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20239?

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-2018-20239?

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

Scan your code now

Source: NVD / NIST