Charitable < 1.8.12 - Unauthenticated Donation Payment-Status Manipulation via Square Webhook Signature Bypass
Priority LOW 29CWE-345Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-345.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00163 5th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Charitable (Unknown): 1.8.12
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Charitable | before 1.8.12 | 1.8.12 | Patch available | CNA |
- Charitable VendorUnknown Affected before 1.8.12 Fixed in 1.8.12 Patch available CNA
Remediation
- Fix · CNA Charitable (Unknown) Fixed in 1.8.12
Timeline
- 2026-10-02 Threatist record created from CVE-2026-16650
- 2026-10-03 Alias added: GHSA-r6r4-9w99-4w36
References
Sources
- CVE-2026-16650 · CVE Program
- CVE-2026-16650 · NVD
- FIRST EPSS
- GHSA-r6r4-9w99-4w36 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences