Absolute path traversal vulnerability in the readerengine component in Open-Xchange OX App Suite before 7.6.3-rev3, 7.8.x before 7.8.2-rev4, 7.8.3 before 7.8.3-rev5, and 7.8.4 before 7.8.4-rev4 allows remote attackers to read arbitrary files via a full pathname in a formula in a spreadsheet.