Download iPadOS 13.1.3 (17A878) for iPad Pro 12.9-inch (WiFi)

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPad6,7
iPadOS Version 13.1.3
Release Date 2019-10-15
Update Date 2019-10-10
Sha1sum
46a4dc656325095579f3620265e94676e7028104
Sha256sum
36d036bab561218ef8ff486f3eef3367f6a686565422dd29a2e4b13c626a0c37
md5sum
9e56b87056386534599ccf1955b500d6
Size 3.48 GB
FileName
iPadPro_12.9_13.1.3_17A878_Restore.ipsw
Status

Download IPSW (3.48GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

iPadOS 13.1.3 includes bug fixes and improvements for your iPad. This update:

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222