Cyber Risks · PortSwigger Research

Flash cross-domain policy

Summary: The Flash cross-domain policy controls whether Flash client components on other domains can perform two-way interaction with the domain that publishes the policy. If an allowed domain is compromised or malicious, content running there can gain full access to the application within the security context of a logged-in user.

What's compelling: Every domain listed in the policy is a domain you are trusting with the security posture of your logged-in users, and a vulnerability in any one of them can be leveraged by a third party to attack your application.

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Topics
Vulnerabilities & Patching
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