Simon Willison’s Weblog


1 item tagged “ouath”


OAuth Security Advisory 2009.1. It’s a show-stopper: an attacker can start an OAuth permission request flow from a consumer site, then trick another user from the same site in to completing that flow and hence authorising the attacker to act on their behalf. A fix to the spec is forthcoming; in the meantime, don’t start an OAuth flow from an untrusted location. # 23rd April 2009, 3:06 pm