CVE-2018-20239
5.4 · MEDIUMOverview
CVE-2018-20239 is a medium-severity vulnerability affecting atlassian application_links. 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 and patches from atlassian. Update application_links to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| atlassian | application_links | >= 0, < 5.0.11 | Affected |
| atlassian | confluence_data_center | >= 0, < 6.15.2 | Affected |
| atlassian | confluence_server | >= 0, < 6.15.2 | Affected |
| atlassian | crowd | >= 0, < 3.4.3 | Affected |
| atlassian | crucible | >= 0, < 4.7.0 | Affected |
| atlassian | fisheye | >= 0, < 4.7.0 | Affected |
| atlassian | jira_data_center | >= 0, < 7.13.3 | Affected |
| atlassian | jira_server | >= 0, < 7.13.3 | Affected |
References
Frequently Asked Questions
What is CVE-2018-20239?
CVE-2018-20239 is a medium-severity vulnerability affecting atlassian application_links. 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 and patches from atlassian. Update application_links to the latest patched version. 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's AI-powered security agents can automatically detect CVE-2018-20239 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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