This High severity DoS (Denial of Service) vulnerability was introduced in version 9.15.2, 9.16.0, 9.17.0, 10.1.1, 10.3.13, 11.2.0 of Jira Software Data Center and Server.

This DoS (Denial of Service) 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 access local and remote content which has no impact to confidentiality, no 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:

• Jira Software Data Center and Server 10.3: Upgrade to a release greater than or equal to 10.3.16
• Jira Software Data Center and Server 11.2: Upgrade to a release greater than or equal to 11.2.1

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: ansi-regex is vulnerable to Inefficient Regular Expression Complexity