This High severity Third-Party Dependency vulnerability was introduced in versions 5.12.23, 10.3.7, 10.5.1, 10.6.0, and 10.7.0 of Jira Service Management Data Center and Server.

This Third-Party Dependency vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N allows an unauthenticated attacker to expose assets in your environment susceptible to exploitation which has no impact to confidentiality, high impact to integrity, no impact to availability, and requires no user interaction.

Atlassian recommends that Jira Service Management Data Center and Server customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:

• Jira Service Management Data Center and Server 5.12: Upgrade to a release greater than or equal to 5.12.24

• Jira Service Management Data Center and Server 10.3: Upgrade to a release greater than or equal to 10.3.8

• Jira Service Management Data Center and Server 10.7: Upgrade to a release greater than or equal to 10.7.2

See the release notes (https://confluence.atlassian.com/servicemanagement/jira-service-management-release-notes-780083086.html). You can download the latest version of Jira Service Management Data Center and Server from the download center (https://www.atlassian.com/software/jira/service-management/download-archives).

The National Vulnerability Database provides the following description for this vulnerability: A bug in PSL validation logic in Apache HttpClient 5.4.x disables domain checks, affecting cookie management and host name verification. Discovered by the Apache HttpClient team.