New Update - Apple has posted a support card for security content of iOS 12.5.4, which resolves three vulnerabilities, two for WebKit, the Safari.
Phone 6 -> iPhone_4.7_12.5.4_16H50_Restore.ipsw
iPhone 6+ -> iPhone_5.5_12.5.4_16H50_Restore.ipsw
iPhone 5s -> iPhone_4.0_64bit_12.5.4_16H50_Restore.ipsw
iPad Air -> iPad_64bit_12.5.4_16H50_Restore.ipsw
iPad mini 2 -> iPad_64bit_12.5.4_16H50_Restore.ipsw
iPad mini 3 -> iPad_64bit_TouchID_12.5.4_16H50_Restore.ipsw
iPod touch 6th Gen -> iPodtouch_12.5.4_16H50_Restore.ipsw
Phone 6 -> iPhone_4.7_12.5.4_16H50_Restore.ipsw
iPhone 6+ -> iPhone_5.5_12.5.4_16H50_Restore.ipsw
iPhone 5s -> iPhone_4.0_64bit_12.5.4_16H50_Restore.ipsw
iPad Air -> iPad_64bit_12.5.4_16H50_Restore.ipsw
iPad mini 2 -> iPad_64bit_12.5.4_16H50_Restore.ipsw
iPad mini 3 -> iPad_64bit_TouchID_12.5.4_16H50_Restore.ipsw
iPod touch 6th Gen -> iPodtouch_12.5.4_16H50_Restore.ipsw