CVE-2026-16650

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

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.

We have discovered 3,577 live websites that are affected by CVE-2026-16650.

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Affected Software

Product  Charitable
Category Wordpress Plugins
Vulnerable Domains3,577 live websites (100% of Charitable install base)
Vulnerable Versions
  • from 0 through 1.8.12
Vulnerable Versions Count140 versions ( 100% of all versions)


Common Weakness Enumeration

CWE-345 Insufficient Verification of Data Authenticity



Details

  • Published - Aug 21, 2026
  • Updated - Aug 21, 2026

Credits

  • Muni Nitish Kumar Yaddala (finder)
  • WPScan (coordinator)

Website Distribution by Country

Number of websites using CVE-2026-16650
United States1,611 websites


GB288 websites
Germany262 websites
Italy211 websites
India117 websites
Canada108 websites
France98 websites
South Africa83 websites
Spain58 websites
Netherlands57 websites

Website Distribution by TLD

Number of websites using CVE-2026-16650
.org1,602 websites
.com731 websites
.it138 websites
.de111 websites
.org.uk79 websites
.net67 websites
.ca66 websites
.co.uk55 websites
.nl43 websites
.pl25 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-16650

Top websites that are affected by CVE-2026-16650. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
*****************.org United States**,***
*****.org United States**,***
**************.org United States**,***
**********.org GB***,***
*****.**.th Thailand***,***
***.nl United States***,***
**************.***.au Australia***,***
*********.org United States***,***
***********.com United States***,***
****************.net United States***,***
See full domain list

FAQ

CVE-2026-16650 is Insufficient Verification of Data Authenticity in Charitable
A total of 3,577 websites have been identified as vulnerable to CVE-2026-16650, based on global website indexing conducted by WebTechSurvey.
The Charitable is affected by the CVE-2026-16650 vulnerability.
Charitable versions up to 1.8.12 are vulnerable to CVE-2026-16650.
CVE-2026-16650 is resolved in version 1.8.12 of Charitable.