CVE-2026-16650 PUBLISHED

Charitable < 1.8.12 - Unauthenticated Donation Payment-Status Manipulation via Square Webhook Signature Bypass

Assigner: WPScan
Reserved: 22.07.2026 Published: 21.08.2026 Updated: 21.08.2026

The Charitable WordPress plugin before 1.8.12 does not verify the authenticity of incoming Square payment webhook events in a default configuration, allowing unauthenticated attackers to forge webhook notifications that mark donations as paid without any real payment.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Unknown
Product	Charitable
Versions	Default: unaffected affected from 0 to 1.8.12 (excl.)

Credits

Muni Nitish Kumar Yaddala finder
WPScan coordinator

References

https://wpscan.com/vulnerability/da611bd1-0702-4cdd-b04c-ad7210f78cfe/

Problem Types

CWE-345 Insufficient Verification of Data Authenticity CWE