CVE-2026-17559 — MEDIUM (5.3)

Vulnerability Description

The Passster WordPress plugin before 4.3.9 does not correctly match its own public endpoint paths when deciding which REST API requests may bypass global password protection, comparing them as an unanchored substring of the request URI rather than against the resolved route, allowing an unauthenticated attacker to read the content of globally password-protected posts and pages.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-863

References

https://wpscan.com/vulnerability/28a48c1c-e162-4e8a-b450-5568fb3a3fc8/

FAQ

What is CVE-2026-17559?

CVE-2026-17559 is a vulnerability with a CVSS score of 5.3 (MEDIUM). The Passster WordPress plugin before 4.3.9 does not correctly match its own public endpoint paths when deciding which REST API requests may bypass global password protection, comparing them as an unan...

How severe is CVE-2026-17559?

CVE-2026-17559 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-17559?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.