add more examples

Author: tayvano

unprotected_function/README.md

@@ -12,5 +12,7 @@ Always specify a modifier for functions.
 
 ## Examples
 - An `onlyOwner` modifier is [defined but not used](Unprotected.sol), allowing anyone to become the `owner`
-- [Parity Wallet](https://blog.zeppelin.solutions/on-the-parity-wallet-multisig-hack-405a8c12e8f7). For code, see [initWallet](WalletLibrary_source_code/WalletLibrary.sol)
-
+- April 2016: [Rubixi allows anyone to become owner](https://etherscan.io/address/0xe82719202e5965Cf5D9B6673B7503a3b92DE20be#code)
+- July 2017: [Parity Wallet](https://blog.zeppelin.solutions/on-the-parity-wallet-multisig-hack-405a8c12e8f7). For code, see [initWallet](WalletLibrary_source_code/WalletLibrary.sol)
+- BitGo Wallet v2 allows anyone to call tryInsertSequenceId. If you try close to MAXINT, no further transactions would be allowed. [Fix: make tryInsertSequenceId private.](https://github.com/BitGo/eth-multisig-v2/commit/8042188f08c879e06f097ae55c140e0aa7baaff8#diff-b498cc6fd64f83803c260abd8de0a8f5)
+- Feb 2020: [Nexus Mutual's Oraclize callback was unprotected—allowing anyone to call it.](https://medium.com/nexus-mutual/responsible-vulnerability-disclosure-ece3fe3bcefa) Oraclize triggers a rebalance to occur via Uniswap.