Product affected: Parity Wallet
Affected implementations: Parity 1.5 or later
Summary: A vulnerability in Parity Wallet's variant of the standard multi-sig contract has been found.
Affected users: Any user with assets in a multi-sig wallet created in Parity Wallet prior to 19/07/17 23:14:56 CEST.
Mitigation steps: Immediately move assets contained in the multi-sig wallet to a secure address.
UPDATE (20/07/17, 00:26 CEST): Multi-sig wallets created in Parity Wallet after 19/07/17 23:14:56 CEST are secure. (Fix in the code is https://github.com/paritytech/parity/pull/6103 and the newly registered code is https://etherscan.io/tx/0x5f0846ccef8946d47f85715b7eea8fb69d3a9b9ef2d2b8abcf83983fb8d94f5f).