Improper Input Validation in ProfileGrid WordPress Plugin Allows Forged Payments
CVE-2026-12688

6.5MEDIUM

Key Information:

Vendor

WordPress
Status
Profilegrid
Vendor
CVE Published:
24 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-12688?

The ProfileGrid WordPress plugin prior to version 5.9.9.7 is susceptible to an improper input validation vulnerability. This flaw allows unauthenticated attackers to exploit the plugin's handling of PayPal Instant Payment Notification (IPN) messages. By forging a valid PayPal notification, an attacker can manipulate user group memberships, granting unauthorized access to paid memberships without the need for legitimate payment. This vulnerability underscores the importance of robust verification processes to protect against unauthorized access within the WordPress ecosystem.

Affected Version(s)

ProfileGrid 0 < 5.9.9.7

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-12688 - Proof of Concept

References

https://wpscan.com/vulnerability/b62a2c10-78da-4a7d-a6e1-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Revanth Hari Narayana Matte
WPScan
.