rachelos WeRSS we-mp-rss tools.py download_export_file path traversal

A flaw has been found in rachelos WeRSS we-mp-rss up to 1.4.8. Impacted is the function download_export_file of the file apis/tools.py. Executing a manipulation of the argument filename can lead to path traversal. The attack can be launched remotely. The exploit has been published and may be used.