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Validation Bypass in paypal-ipn

Moderate severity GitHub Reviewed Published Aug 31, 2020 to the GitHub Advisory Database • Updated Jan 9, 2023

Package

npm paypal-ipn (npm)

Affected versions

< 3.0.0

Patched versions

3.0.0

Description

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.

References

Reviewed Aug 31, 2020
Published to the GitHub Advisory Database Aug 31, 2020
Last updated Jan 9, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.148%
(51st percentile)

Weaknesses

CVE ID

CVE-2014-10067

GHSA ID

GHSA-h698-r4hm-w94p

Source code

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