MediaWiki before 1.18.1 did not require a CSRF token for the "Mark all pages visited" action on the watchlist.
MediaWiki before 1.18.1 did not require a CSRF token for the "Mark all pages visited" action on the watchlist.
https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-April/000207.html https://phabricator.wikimedia.org/T150044