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Advisories

GetPaid WordPress Plugin < 2.8.63 Negative Quantity Payment Bypass

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Severity
high
Date
Affecting

  • Payment forms, Buy now buttons, and Invoicing System | GetPaid < 2.8.63

CWE
  • CWE-1284 Improper Validation of Specified Quantity in Input
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Idan Malihi
Description
The GetPaid plugin for WordPress before 2.8.63 contains an improper input validation vulnerability that allows unauthenticated attackers to bypass payment processing by submitting a negative item quantity on a public payment form. Attackers can exploit the unchecked quantity value in process_item() to produce a negative line subtotal that reduces the invoice total to zero, causing process_free_payment() to mark the invoice as paid without any actual gateway charge.

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