Cross site request forgery (csrf)

1 ApiBlock.php, 2 ApiCreateAccount.php, 3 ApiLogin.php, 4 ApiMain.php, 5 ApiQueryDeletedrevs.php, 6 ApiTokens.php, and 7 ApiUnblock.php in includes/api/ in MediaWiki 1.19.x before 1.19.8, 1.20.x before 1.20.7, and 1.21.x before 1.21.2 allow remote attackers to obtain CSRF tokens and bypass the...