DoS (Denial of Service) org.apache.commons:commons-configuration2 Dependency in Confluence Data Center and Server

This High severity org.apache.commons:commons-configuration2 Dependency vulnerability was introduced in versions 1.0 of Confluence Data Center and Server.

This org.apache.commons:commons-configuration2 Dependency vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an unauthenticated attacker to trigger a stack overflow by submitting a crafted configuration file or input, leading to a denial of service condition.

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:
h2. Data Center

Atlassian recommends that Confluence Data Center customers upgrade to the latest version. If you are unable to do so, upgrade your instance to one of the specified supported fixed versions:
||Affected versions||Fixed versions||
|8.9.0|8.9.1|
|from 8.8.0 to 8.8.1|8.9.1|
|from 8.7.0 to 8.7.2|8.9.1|
|from 8.6.0 to 8.6.2|8.9.1|
|from 8.5.0 to 8.5.8 LTS|8.9.1 or 8.5.9 LTS recommended|
|from 8.4.0 to 8.4.5|8.9.1 or 8.5.9 LTS recommended|
|from 8.3.0 to 8.3.4|8.9.1 or 8.5.9 LTS recommended|
|from 8.2.0 to 8.2.3|8.9.1 or 8.5.9 LTS recommended|
|from 8.1.0 to 8.1.4|8.9.1 or 8.5.9 LTS recommended|
|from 8.0.0 to 8.0.4|8.9.1 or 8.5.9 LTS recommended|
|from 7.20.0 to 7.20.3|8.9.1 or 8.5.9 LTS recommended|
|from 7.19.0 to 7.19.22 LTS|8.9.1 or 8.5.9 LTS recommended or 7.19.23 LTS|
|from 7.18.0 to 7.18.3|8.9.1 or 8.5.9 LTS recommended or 7.19.23 LTS|
|from 7.17.0 to 7.17.5|8.9.1 or 8.5.9 LTS recommended or 7.19.23 LTS|
|Any earlier versions|8.9.1 or 8.5.9 LTS recommended or 7.19.23 LTS|

h2. Server

Atlassian recommends that Confluence Server customers upgrade to the latest version. If you are unable to do so, upgrade your instance to one of the specified supported fixed versions:
||Affected versions||Fixed versions||
|from 8.5.0 to 8.5.8 LTS|8.5.9 LTS recommended|
|from 8.4.0 to 8.4.5|8.5.9 LTS recommended|
|from 8.3.0 to 8.3.4|8.5.9 LTS recommended|
|from 8.2.0 to 8.2.3|8.5.9 LTS recommended|
|from 8.1.0 to 8.1.4|8.5.9 LTS recommended|
|from 8.0.0 to 8.0.4|8.5.9 LTS recommended|
|from 7.20.0 to 7.20.3|8.5.9 LTS recommended|
|from 7.19.0 to 7.19.22 LTS|8.5.9 LTS recommended or 7.19.23 LTS|
|from 7.18.0 to 7.18.3|8.5.9 LTS recommended or 7.19.23 LTS|
|from 7.17.0 to 7.17.5|8.5.9 LTS recommended or 7.19.23 LTS|
|Any earlier versions|8.5.9 LTS recommended or 7.19.23 LTS|

See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center and Server from the download center ([https://www.atlassian.com/software/confluence/download-archives]).