Information Disclosure in Passster Plugin for WordPress by Passster
CVE-2026-16604

7.5HIGH

Key Information:

Vendor

WordPress
Status
Passster
Vendor
CVE Published:
5 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-16604?

The Passster plugin for WordPress, prior to version 4.3.6, is susceptible to a vulnerability that exposes password-protected block content to unauthenticated users. This occurs because the plugin fails to properly verify the password before rendering the protected content in the public response. As a result, users can access sensitive information without authorization.

Affected Version(s)

Passster 0 < 4.3.6

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-2026-16604 - Proof of Concept

References

https://wpscan.com/vulnerability/6a3222e3-352f-4fe8-b17f-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
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

Revanth Hari Narayana Matte
WPScan
.