Authentication Bypass Vulnerability in Divi Membership Plugin for WordPress
CVE-2026-19660

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Divi Membership
Vendor
CVE Published:
2 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19660?

The Divi Membership plugin for WordPress has a critical vulnerability that allows unauthenticated attackers to bypass authentication processes, enabling them to log in as any existing user, including administrators. This issue arises from a flaw in how the process_paypal_callback function handles the paypal_param GET parameter, which lacks essential validation measures such as IPN validation, cryptographic signature checks, and nonce verification. By exploiting this vulnerability, attackers can tamper with the user ID passed to wp_set_current_user() and wp_set_auth_cookie(), leading to unauthorized access and potential full site control. The problematic design persists as the PayPal gateway class is always instantiated, ensuring the vulnerability is present on every front-end request, whether PayPal is active or not.

Affected Version(s)

Divi Membership 0 <= 2.3.0

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-2026-19660
Created by murrez

CVE-2026-19660-exploit
Created by MRdark-ops

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://diviengine.com/divi-membership-changelog/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
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

0xd4rk5id3
.