What is CVE-2026-16604?

CVE-2026-16604 is a high-severity vulnerability in Passster, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-08-05.

How severe is CVE-2026-16604?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Passster

CVE-2026-16604

The Passster WordPress plugin before 4.3.6 outputs password-protected block content in the public page response before verifying the password, allowing unauthenticated users to recover the protected content without knowing the password.

Vulnerability class: Information Disclosure

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Unknown Passster — versions 0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-16604?: CVE-2026-16604 is a high-severity vulnerability in Passster, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-08-05.
How severe is CVE-2026-16604?: High severity. CVSS v3 base score is 7.5 out of 10.