This High severity Third-Party Dependency vulnerability was introduced in versions 8.20.0, 9.4.0, 9.5.0, 9.6.0, 9.7.0, 9.8.0, 9.9.0, 9.10.0, 9.10.1, and 9.11.0 of Jira Software 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:N/A:H 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 Software 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 Software Data Center and Server 9.10: Upgrade to a release greater than or equal to 9.10.2

• Jira Software Data Center and Server 9.11: Upgrade to a release greater than or equal to 9.11.1

See the release notes. You can download the latest version of Jira Software Data Center and Server from the download center.

The National Vulnerability Database provides the following description for this vulnerability: In Eclipse Jetty 7.2.2 to 9.4.38, 10.0.0.alpha0 to 10.0.1, and 11.0.0.alpha0 to 11.0.1, CPU usage can reach 100% upon receiving a large invalid TLS frame.