The Deluge Web-UI is vulnerable to XSS through a crafted torrent file. The the data from torrent files is not properly sanitised as it's interpreted directly as HTML. Someone who supplies the user with a malicious torrent file can execute arbitrary Javascript code in the context of the user's browser session.
{
"cpe": "cpe:2.3:a:deluge-torrent:deluge:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "2.1.0"
}
],
"source": "CPE_RANGE"
}