XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 when View Source mode or Reader mode is used, as demonstrated by a a page title.
{
"unresolved_ranges": [
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "10.0"
}
]
},
{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "11.0"
}
]
}
]
}{
"source": "CPE_FIELD",
"cpe": "cpe:2.3:a:gnome:epiphany:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "40.4"
},
{
"introduced": "41.0"
},
{
"fixed": "41.1"
}
]
}