Insecure Payment Calculation in Easy PayPal & Stripe Buy Now Button Plugin
CVE-2026-90987

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Easy Paypal & Stripe Buy Now Button
Vendor
CVE Published:
2 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90987?

The Easy PayPal & Stripe Buy Now Button WordPress plugin, prior to version 2.0.6, contains a vulnerability where the payment amount is derived directly from a client-supplied field. This design flaw allows unauthenticated attackers to manipulate the payment amount, enabling them to set an arbitrary lower price for a product during the transaction process. As a result, users may inadvertently purchase items at significantly reduced prices, leading to potential revenue loss for merchants and undermining the integrity of the payment processing system.

Affected Version(s)

Easy PayPal & Stripe Buy Now Button 1.8 < 2.0.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-90987 - Proof of Concept

References

https://wpscan.com/vulnerability/7c1faee8-628a-41dc-a5f0-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

JunHee CHO
WPScan
.