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CVE-2026-17559— Content Protector (Passster) < 4.3.9 - Unauthenticated Protected Content Disclosure via REST Path Allowlist Bypass

Quick assessment

Affected
Unknown Passster
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 4.3.9 版本之前的 Passster WordPress 插件在决定哪些 REST API 请求可以绕过全局密码保护时，未能正确匹配其自身的公共端点路径。该插件将请求 URI 中的路径作为未锚定的子字符串进行比较，而不是与已解析的路由（resolved route）进行比对。这一缺陷使得未经身份验证的攻击者能够读取受全局密码保护的文章和页面内容。

CVSS 5.3 · Medium EPSS 0.26% · P17

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Passster 4.3.3< 4.3.9 affected
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I. Basic Information for CVE-2026-17559

Vulnerability Information
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Vulnerability Title
Content Protector (Passster) < 4.3.9 - Unauthenticated Protected Content Disclosure via REST Path Allowlist Bypass
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Passster 4.3.3 ~ 4.3.9 -

II. Public POCs for CVE-2026-17559

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III. Intelligence Information for CVE-2026-17559

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Vendor Advisories for CVE-2026-17559 (1)

Same Patch Batch · Unknown · 2026-08-21 · 20 CVEs total

CVE-2026-19848 6.5 MEDIUM ProfilePress < 4.17.1 - Unauthenticated Arbitrary Shortcode Execution via Display Name
CVE-2026-16650 5.3 MEDIUM Charitable < 1.8.12 - Unauthenticated Donation Payment-Status Manipulation via Square Webh
CVE-2026-15150 5.3 MEDIUM myCred < 3.2.5 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver Verificati
CVE-2026-15046 4.2 MEDIUM LitExtension: Store to WooCommerce Migration <= 1.2.5 - Connector Token Takeover via CSRF
CVE-2026-18356 3.7 LOW Limit Login Attempts Reloaded < 3.3.5 - Username Denylist Bypass via Case Variant and Acco
CVE-2026-13176 2.7 LOW Eventin < 4.1.21 - Contributor+ Server-Side Request Forgery
CVE-2026-13736 NewPath WildApricotPress Add-on – Member Directory <= 1.0.0 - Unauthenticated Member PII D
CVE-2025-15671 Welcart e-Commerce < 2.12.1 - Session Fixation via uscesid Parameter
CVE-2026-14325 Drag and Drop Multiple File Upload for Contact Form 7 < 1.3.9.9 - Admin+ Stored XSS via dr
CVE-2026-14601 Link Whisper < 0.9.7 - Editor+ SQL Injection via domain Parameter
CVE-2026-16576 Dokan < 5.0.14 - Shop Manager+ Arbitrary Plugin Installation/Activation via REST API
CVE-2026-16962 Tamara Checkout <= 1.9.9.20 - Unauthenticated Order Status Manipulation
CVE-2026-16575 Dokan < 5.0.14 - Unauthenticated Commission Settings Disclosure via Store Categories REST
CVE-2026-19085 Copy & Delete Posts < 1.5.6 - Author+ Password-Protected Post Content Disclosure
CVE-2026-19435 Copy & Delete Posts < 1.5.6 - Authenticated Arbitrary Post Content and Password Disclosure
CVE-2026-18781 Drag and Drop Multiple File Upload for Contact Form 7 < 1.3.9.9 - Unauthenticated RCE via
CVE-2026-16959 Media Library Assistant < 3.40 - Author+ SQL Injection via mla_search_connector
CVE-2026-16577 Dokan < 5.0.14 - Vendor+ Reverse Withdrawal Ledger Manipulation via Client-Supplied Amount
CVE-2026-75796 AI Engine 2.8.0 - 3.6.0 - Admin+ Multisite Network Administrator Account Takeover via MCP

IV. Related Vulnerabilities

Same product: Passster
Same vendor: Unknown

V. Comments for CVE-2026-17559

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