# CVE-2026-12688: ProfileGrid WordPress plugin payment bypass in PayPal IPN

Source: https://junglewise.ai/threats/cve-2026-12688-profilegrid-wordpress-plugin-payment-bypass-in-paypal-ipn  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-24. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-12688 · Severity: info · CVSS 5.3 · Published 2026-07-24

The ProfileGrid plugin for WordPress, which manages user profiles and paid memberships, contains a flaw in how it handles payment notifications. An attacker can bypass the payment process by sending a fake notification to the website, tricking the system into granting them or any other user access to paid groups without actually paying. This can lead to loss of revenue and unauthorized access to premium content or community features.

Technologies: [ProfileGrid](https://junglewise.ai/threats/technologies/profilegrid). Vendors: [ProfileGrid](https://junglewise.ai/threats/vendors/profilegrid).

## Quick answers

**Is CVE-2026-12688 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12688 being exploited in the wild.

**How severe is CVE-2026-12688?** Informational severity, with a CVSS score of 5.3, published 24 July 2026.

**Which products and versions are affected?** ProfileGrid < 5.9.9.7.

**Is there a fix for CVE-2026-12688?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-12688 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-12688?** Check whether you run ProfileGrid at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The ProfileGrid plugin fails to validate the authenticity of PayPal Instant Payment Notifications (IPN) before processing them. Specifically, the plugin does not verify the notification with PayPal's servers or check if the receiver email matches the configured business address. An unauthenticated attacker can send a crafted POST request to the IPN landing page with forged parameters (such as payment_status=Completed and a custom user/group ID string). This results in the plugin updating user metadata to reflect a successful payment, granting the 'paid' membership status without a valid transaction. The issue is fixed in version 5.9.9.7.

## Affected products

- ProfileGrid ProfileGrid < 5.9.9.7

## Timeline

- 2026-07-03: disclosed: Public disclosure via WPScan
- 2026-07-24: advisory: NVD publication date

## References

- [https://wpscan.com/vulnerability/b62a2c10-78da-4a7d-a6e1-f50ebf0763db/](https://wpscan.com/vulnerability/b62a2c10-78da-4a7d-a6e1-f50ebf0763db/)

## Related threats

- [WordPress Frontend Dashboard and ProfileGrid PHP object injection](https://junglewise.ai/threats/cve-2026-103693-the-frontend-dashboard-wordpress-plugin-before-3-0-5-profilegrid)
- [ProfileGrid arbitrary notification deletion via IDOR](https://junglewise.ai/threats/cve-2026-16291-profilegrid-arbitrary-notification-deletion-via-idor)
- [ProfileGrid WordPress plugin unauthenticated privilege escalation](https://junglewise.ai/threats/cve-2026-12687-profilegrid-wordpress-plugin-unauthenticated-privilege-escalation)
- [ProfileGrid WordPress plugin missing authorization in license management](https://junglewise.ai/threats/cve-2026-12690-profilegrid-wordpress-plugin-missing-authorization-in-license)
- [ProfileGrid WordPress plugin missing authorization in private messaging](https://junglewise.ai/threats/cve-2026-12689-profilegrid-wordpress-plugin-missing-authorization-in-private)