24 July 2018
Patched on 2nd July 2018 in version 5.1.8.
Dennis Herrmann and Malte Poll
A directory traversal flaw in SeedDMS (formerly LetoDMS and MyDMS) before 5.1.8 allows an authenticated attacker to write to (or potentially delete) arbitrary files via a .. (dot dot) in the "op/op.UploadChunks.php"; "qquuid" parameter. NOTE: this can be leveraged to execute arbitrary code by using CVE-2018-12940.