This High severity com.google.code.gson:gson Dependency vulnerability was introduced in versions 9.0.0, 9.1.0, 9.2.0, 9.3.0, 9.4.0, 9.5.0, 9.6.0, 9.7.0, 9.8.0, 9.9.0, 9.10.0 and 9.11.0 of Jira Software Data Center and Server.

This com.google.code.gson:gson 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 high impact to confidentiality, high impact to integrity, high 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:

See the release notes (https://www.atlassian.com/software/jira/download-archives). You can download the latest version of Jira Software Data Center and Server from the download center (https://www.atlassian.com/software/jira/download-archives).

The National Vulnerability Database provides the following description for this vulnerability: The package com.google.code.gson:gson before 2.8.9 are vulnerable to Deserialization of Untrusted Data via the writeReplace() method in internal classes, which may lead to DoS attacks.