Mediawiki before 1.28.1 / 1.27.2 / 1.23.16 contains a flaw allowing to evade SVG filter using default attribute values in DTD declaration.
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "1:1.27.4-3", "binary_name": "mediawiki" }, { "binary_version": "1:1.27.4-3", "binary_name": "mediawiki-classes" } ] }