CVE-2026-17559
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductPassster
PublishedAug 21, 2026
First seenAug 21, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- Passster4.3.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Passster | 4.3.3 ≤ v < 4.3.9 | 4.3.9 |
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