title: Special:UserLogin?returnto=interwiki:foo will redirect to external sites
description: Mediawiki before 1.28.1 / 1.27.2 / 1.23.16 has a flaw where Special:UserLogin?returnto=interwiki:foo will redirect to external sites.
problem types: redirection to other external sites
affected:
{
product: mediawiki
vendor: mediawiki
versions:
status: affected, version: n/a
}