• This is a critical vulnerability in a non-Atlassian Confluence dependency. However, Atlassian’s application of the dependency presents a lower assessed risk, which is why we are disclosing this vulnerability in our monthly Security Bulletin instead of a Critical Security Advisory.

This Critical severity vulnerability known as CVE-2023-42282 was introduced in 7.19.0, 8.5.0, 8.6.0, 8.8.0, 8.7.1, 8.9.0, 9.1.0, 9.0.1, 9.2.5, 9.5.1 of Confluence Data Center and Server.

This vulnerability with a CVSS Score of 9.8 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Atlassian recommends that Confluence 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:

• Confluence Data Center and Server 8.5: Upgrade to a release greater than or equal to 8.5.20
• Confluence Data Center and Server 9.4: Upgrade to a release greater than or equal to 9.4.0

• Confluence Data Center and Server 9.3: Upgrade to a release greater than or equal to 9.3.1

• Confluence Data Center and Server 9.2: Upgrade to a release greater than or equal to 9.2.6

• Confluence Data Center and Server 9.5: Upgrade to a release greater than or equal to 9.5.2

• Confluence Data Center and Server 10.1: Upgrade to a release greater than or equal to 10.1.0

• Confluence Data Center and Server 10.0: Upgrade to a release greater than or equal to 10.0.2

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