Cross-site scripting (XSS) vulnerability in the frontend in Open-Xchange (OX) AppSuite 6.22.3 before 6.22.3-rev5 and 6.22.4 before 6.22.4-rev12 allows remote attackers to inject arbitrary web script or HTML via the subject of an email. NOTE: the vulnerabilities related to the body of the email and the publication name were SPLIT from this CVE ID because they affect different sets of versions.