MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry itself does not escape in all code paths. For example, the return of Language::userTimeAndDate is is always unsafe for HTML in a month value. This affects MediaWiki 1.12.0 and later.
{
"unresolved_ranges": [
{
"source": "CPE_FIELD",
"vendor_product": "debian:debian_linux",
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"last_affected": "9.0"
},
{
"last_affected": "10.0"
}
]
},
{
"source": "CPE_FIELD",
"vendor_product": "fedoraproject:fedora",
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"last_affected": "33"
}
]
}
]
}