Mediawiki before 1.28.1 / 1.27.2 / 1.23.16 contains a flaw where the "Mark all pages visited" on the watchlist does not require a CSRF token.
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "binary_version": "1:1.27.4-3", "binary_name": "mediawiki" }, { "binary_version": "1:1.27.4-3", "binary_name": "mediawiki-classes" } ] }