Validation Bypass Affecting paypal-ipn package, versions <3.0.0



    Attack Complexity Low

    Threat Intelligence

    EPSS 0.15% (51st percentile)
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5.9 medium

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  • Snyk ID npm:paypal-ipn:20141203
  • published 3 Dec 2014
  • disclosed 3 Dec 2014
  • credit Martin Angelov

How to fix?

Upgrade to version 3.0.0 or greater.


paypal-ipn uses the test_ipn parameter (which is set by the PayPal IPN simulator) to determine if it should use the production PayPal site or the sandbox.

"With a bit of time, an attacker could craft a request using the simulator that would fool any application which does not explicitly check for test_ipn in production." [1]

Source: Node Security Project