SiteServer CMS < V5.1 is affected by an unrestricted upload of a file with dangerous type (getshell), which could be used to execute arbitrary code.Referenceshttps://github.com/siteserver/cmshttps://github.com/siteserver/cms/issues/3236https://github.com/siteserver/cms/releases/download/siteserver-dev-v5.0.92/siteserver_install.zip