CVE-2026-16650: CWE-345 Insufficient Verification of Data Authenticity in Charitable
Description
The Charitable WordPress plugin versions before 1.8.12 do not verify the authenticity of incoming Square payment webhook events by default. This vulnerability allows unauthenticated attackers to forge webhook notifications, causing the plugin to mark donations as paid without actual payment. The issue is classified as CWE-345, insufficient verification of data authenticity. The CVSS score is 5.3, indicating a medium severity level.
CVSS v3.1
Score 5.3medium
Affected software
Charitable
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16650 affects the Charitable WordPress plugin prior to version 1.8.12. The plugin fails to verify the authenticity of Square payment webhook events in its default configuration. This lack of verification enables unauthenticated attackers to send forged webhook notifications that the plugin accepts as valid, resulting in donations being marked as paid without any real payment transaction. The vulnerability is categorized under CWE-345, which concerns insufficient verification of data authenticity.
Potential Impact
An attacker can exploit this vulnerability to forge Square payment webhook notifications, causing the Charitable plugin to incorrectly mark donations as paid. This can lead to financial discrepancies and potential loss of revenue for organizations using the plugin. There is no indication of confidentiality or availability impact. No known exploits are reported in the wild.
Mitigation Recommendations
A fix is available in Charitable version 1.8.12 and later. Users should upgrade to version 1.8.12 or newer to ensure webhook authenticity verification is properly implemented. No additional mitigation steps are indicated in the advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-22T17:23:37.828Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a883c15acd9273b4916aa2b
Added to database: 08/21/2026, 11:52:53 UTC
Last enriched: 09/11/2026, 02:48:52 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 72
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