The host is installed with Atlassian Confluence Server 6.0.1 before 7.19.18 or 7.20.0 before 8.5.5 and is prone to a denial of service vulnerability. A flaw is present in the application which fails to properly handle an issue in the ch.qos.logback:logback-classic. Successful exploitation allows an unauthenticated attacker to expose assets in the environment susceptible to exploitation which has no impact to confidentiality, no impact to integrity, high impact to availability, and requires no user interaction.