Pydio Cells before 1.5.0 fails to neutralize '../' elements, allowing an attacker with minimum privilege to Upload files to, and Delete files/folders from, an unprivileged directory, leading to Privilege escalation.
https://research.loginsoft.com/vulnerability/multiple-vulnerabilities-in-pydio-cells-1-4-1/
https://pydio.com/en/community/releases/pydio-cells/pydio-cells-150-performances-features-security