Discuz! 7.0-7.2 the background settings. inc. php to write shell vulnerability-vulnerability warning-the black bar safety net

Impact version Discuz! 7.0-7.2 Vulnerability details: if$operation == 'uc' && iswriteable'./ config.inc.php' && $isfounder $ucdbpassnew = $settingsnew'uc''dbpass' == '' ? UCDBPW : $settingsnew'uc''dbpass'; if$settingsnew'uc''connect' $ucdblink = @mysqlconnect$settingsnew'uc''dbhost',...