This affects the package plupload before 2.3.9. A file name containing JavaScript code could be uploaded and run. An attacker would need to trick a user to upload this kind of file.
{ "binaries": [ { "binary_name": "libjs-plupload", "binary_version": "2.1.8~dfsg1-1" } ] }
{ "binaries": [ { "binary_name": "libjs-plupload", "binary_version": "2.1.9~dfsg1-2" } ] }