CVE-2021-43942
6.1 · MEDIUMOverview
CVE-2021-43942 is a medium-severity vulnerability affecting atlassian jira_server. It was published on January 4, 2022 and has a CVSS 3.1 base score of 6.1 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Affected versions of Atlassian Jira Server and Data Center allow remote attackers to inject arbitrary HTML or JavaScript via a Reflected Cross-Site Scripting (XSS) vulnerability in the /rest/collectors/1.0/template/custom endpoint. To exploit this issue, the attacker must trick a user into visiting a malicious website. The affected versions are before version 8.13.15, and from version 8.14.0 before 8.20.3.
Remediation
Check the references section for vendor advisories and patches from atlassian. Update jira_server 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 | jira_server | >= 8.14.0, < 8.20.3 | Affected |
| atlassian | jira_server_and_data_center | >= 0, < 8.13.5 | Affected |
Frequently Asked Questions
What is CVE-2021-43942?
CVE-2021-43942 is a medium-severity vulnerability affecting atlassian jira_server. It was published on January 4, 2022 and has a CVSS 3.1 base score of 6.1 (MEDIUM).
How severe is CVE-2021-43942?
This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-43942?
Check the references section for vendor advisories and patches from atlassian. Update jira_server 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-2021-43942?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-43942 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
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