DIAMOND How To Bypass "Proof of Possession" (DPoP) in OAuth 2.1

[TheMekanic]

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Modern apps for Revolut, Wise, and Monzo now use DPoP (Demonstrating Proof-of-Possession). This binds an access token to a specific private key on the user's device. If you just steal the cookie, it won't work.
The Exploit: > * Key-Pair Extraction: How to use a rooted environment to extract the ephemeral private key from the app’s TEE (Trusted Execution Environment).

• JWT Forgery: How to generate the
   
  
  Code:

  DPoP
  header manually using the extracted key to sign the HTTP method and URI.
  
• The Result: Full account takeover even on "Hardware-Bound" sessions.
  

Tooling: Requires Frida 18.x and a custom LoliCode signing block.

Code:

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