Apple just pushed out a minor update to iOS 18.1 when it became aware of exploits to JavScriptCore and Webkit Vulnerabilities on some devices. Basically some websites could use scripts to attack your device. It is recommended to update as soon as possible. Here are the direct download links for iOS 18.1.1 and you can always update over the air:

• iOS 17.7.2 (Build 21H221) for:
  • iPad Pro 2 (12.9”, Wi-Fi) (iPad7,1) — Download
  • iPad Pro 2 (12.9”, Cellular) (iPad7,2) — Download
  • iPad Pro (10.5”, Wi-Fi) (iPad7,3) — Download
  • iPad Pro (10.5”, Cellular) (iPad7,4) — Download
  • iPad 6 (Wi-Fi) (iPad7,5) — Download
  • iPad 6 (Cellular) (iPad7,6) — Download
• iOS 18.1.1 (Build 22B91) for:
  • iPad 7 (Wi-Fi) (iPad7,11) — Download
  • iPad 7 (Cellular) (iPad7,12) — Download
  • iPad Pro 3 (11”, Wi-Fi) (iPad8,1) — Download
  • iPad Pro 3 (11”, Wi-Fi, 1 TB) (iPad8,2) — Download
  • iPad Pro 3 (11”, Cellular) (iPad8,3) — Download
  • iPad Pro 3 (11”, Cellular, 1 TB) (iPad8,4) — Download
  • iPad Pro 3 (12.9”, Wi-Fi) (iPad8,5) — Download
  • iPad Pro 3 (12.9”, Wi-Fi, 1 TB) (iPad8,6) — Download
  • iPad Pro 3 (12.9”, Cellular) (iPad8,7) — Download
  • iPad Pro 3 (12.9”, Cellular, 1 TB) (iPad8,8) — Download
  • iPad8,9 (iPad8,9) — Download
  • iPad8,10 (iPad8,10) — Download
  • iPad8,11 (iPad8,11) — Download
  • iPad8,12 (iPad8,12) — Download
  • iPad mini 5 (Wi-Fi) (iPad11,1) — Download
  • iPad mini 5 (Cellular) (iPad11,2) — Download
  • iPad Air 3 (Wi-Fi) (iPad11,3) — Download
  • iPad Air 3 (Cellular) (iPad11,4) — Download
  • iPad11,6 (iPad11,6) — Download
  • iPad11,7 (iPad11,7) — Download
  • iPad12,1 (iPad12,1) — Download
  • iPad12,2 (iPad12,2) — Download
  • iPad13,1 (iPad13,1) — Download
  • iPad13,2 (iPad13,2) — Download
  • iPad13,4 (iPad13,4) — Download
  • iPad13,5 (iPad13,5) — Download
  • iPad13,6 (iPad13,6) — Download
  • iPad13,7 (iPad13,7) — Download
  • iPad13,8 (iPad13,8) — Download
  • iPad13,9 (iPad13,9) — Download
  • iPad13,10 (iPad13,10) — Download
  • iPad13,11 (iPad13,11) — Download
  • iPad13,16 (iPad13,16) — Download
  • iPad13,17 (iPad13,17) — Download
  • iPad13,18 (iPad13,18) — Download
  • iPad13,19 (iPad13,19) — Download
  • iPad14,1 (iPad14,1) — Download
  • iPad14,2 (iPad14,2) — Download
  • iPad14,3 (iPad14,3) — Download
  • iPad14,4 (iPad14,4) — Download
  • iPad14,5 (iPad14,5) — Download
  • iPad14,6 (iPad14,6) — Download
  • iPad14,8 (iPad14,8) — Download
  • iPad14,9 (iPad14,9) — Download
  • iPad14,10 (iPad14,10) — Download
  • iPad14,11 (iPad14,11) — Download
  • iPad16,1 (iPad16,1) — Download
  • iPad16,2 (iPad16,2) — Download
  • iPad16,3 (iPad16,3) — Download
  • iPad16,4 (iPad16,4) — Download
  • iPad16,5 (iPad16,5) — Download
  • iPad16,6 (iPad16,6) — Download
  • iPhone XS (iPhone11,2) — Download
  • iPhone XS Max (China) (iPhone11,6) — Download
  • iPhone XR (iPhone11,8) — Download
  • iPhone 11 (iPhone12,1) — Download
  • iPhone 11 Pro (iPhone12,3) — Download
  • iPhone 11 Pro Max (iPhone12,5) — Download
  • iPhone12,8 (iPhone12,8) — Download
  • iPhone13,1 (iPhone13,1) — Download
  • iPhone13,2 (iPhone13,2) — Download
  • iPhone13,3 (iPhone13,3) — Download
  • iPhone13,4 (iPhone13,4) — Download
  • iPhone14,2 (iPhone14,2) — Download
  • iPhone14,3 (iPhone14,3) — Download
  • iPhone14,4 (iPhone14,4) — Download
  • iPhone14,5 (iPhone14,5) — Download
  • iPhone14,6 (iPhone14,6) — Download
  • iPhone14,7 (iPhone14,7) — Download
  • iPhone14,8 (iPhone14,8) — Download
  • iPhone15,2 (iPhone15,2) — Download
  • iPhone15,3 (iPhone15,3) — Download
  • iPhone15,4 (iPhone15,4) — Download
  • iPhone15,5 (iPhone15,5) — Download
  • iPhone16,1 (iPhone16,1) — Download
  • iPhone16,2 (iPhone16,2) — Download
  • iPhone17,1 (iPhone17,1) — Download
  • iPhone17,2 (iPhone17,2) — Download
  • iPhone17,3 (iPhone17,3) — Download
  • iPhone17,4 (iPhone17,4) — Download