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CVE-2018-20239

5.4 · MEDIUM

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 attac…

Published Apr 30, 2019CWE-79EPSS 3.34%

Overview

CVE-2018-20239 is a medium-severity vulnerability. It was published on April 30, 2019 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refecosystem.atlassian.net/browse/APL-1373Refjira.atlassian.com/browse/CONFSERVER-58208Refjira.atlassian.com/browse/CRUC-8379Refjira.atlassian.com/browse/CWD-5362Refjira.atlassian.com/browse/FE-7161Refjira.atlassian.com/browse/JRASERVER-68855Refecosystem.atlassian.net/browse/APL-1373Refjira.atlassian.com/browse/CONFSERVER-58208Refjira.atlassian.com/browse/CRUC-8379Refjira.atlassian.com/browse/CWD-5362

How CyberStrike helps

Frequently asked questions

What is CVE-2018-20239?

CVE-2018-20239 is a medium-severity vulnerability. It was published on April 30, 2019 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2018-20239?

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2018-20239?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-20239?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-20239 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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