Validation Bypass in paypal-ipn
Versions 2.x.x and earlier of paypal-ipn are affected by a validation bypass vulnerability.
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.
A motivated attacker could craft a request string using the simulator to fool the application into entering the sandbox mode, potentially allowing purchases without valid payment.
Recommendation
Upgrade to version 3.0.0 or later.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | paypal-ipn | < 3.0.0 | 3.0.0 |
References
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-287- Platform
- npm
- Package
paypal-ipn- Disclosed
- 31.08.2020
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-h698-r4hm-w94p - CC BY 4.0
Vulnerability history: paypal-ipn
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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