CVE-2026-16650 Charitable < 1.8.12 - Unauthenticated Donation Payment-Status Manipulation via Square Webhook Signature Bypass
Unauthenticated attackers can bypass Square webhook signature verification to forge payment notifications, marking donations as paid without actual funds.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16650?
CVE-2026-16650 is a medium-severity vulnerability in Unknown Charitable, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-345
Which versions are affected by CVE-2026-16650?
How do I fix CVE-2026-16650?
No fix has been published for CVE-2026-16650 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-16650 being exploited?
There is no known exploitation of CVE-2026-16650 in the wild and no public exploit code.
Sources
Also known as GHSA-r6r4-9w99-4w36.