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CVE-2026-16604— Content Protector (Passster) < 4.3.6 - Unauthenticated Protected Content Disclosure via Content-Lock Block data-content Attribute

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.

WordPress passster是WordPress基金会开源的一款内容密码保护插件。 WordPress passster 4.3.6之前版本存在安全漏洞，该漏洞源于在验证密码之前输出受密码保护的块内容，可能导致未经身份验证的用户无需知道密码即可获取受保护内容。

AI Predicted 7.5 Difficulty: Trivial EPSS 0.43% · P35

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Passster < 4.3.6 affected
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I. Basic Information for CVE-2026-16604

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Content Protector (Passster) < 4.3.6 - Unauthenticated Protected Content Disclosure via Content-Lock Block data-content Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress passster 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress passster是WordPress基金会开源的一款内容密码保护插件。 WordPress passster 4.3.6之前版本存在安全漏洞，该漏洞源于在验证密码之前输出受密码保护的块内容，可能导致未经身份验证的用户无需知道密码即可获取受保护内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Passster 0 ~ 4.3.6 -

II. Public POCs for CVE-2026-16604

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III. Intelligence Information for CVE-2026-16604

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Vendor Advisories for CVE-2026-16604 (1)

Same Patch Batch · Unknown · 2026-08-05 · 24 CVEs total

CVE-2026-16993 DHL for WooCommerce < 4.0.1 - Unauthenticated Shipping Label Disclosure via Unprotected Up
CVE-2026-17515 MLS Import < 7.0.4 - Subscriber+ Sensitive Information Disclosure via mlsimport_logger_per
CVE-2026-16036 miniOrange 2FA < 6.2.7 - 2FA Bypass via Password-Only Second-Factor Rebinding
CVE-2026-16055 Contest Gallery < 30.0.7 - Unauthenticated Login-Protection and 2FA Bypass via post_cg_log
CVE-2025-15677 GeoDirectory < 2.8.110 - Editor+ Stored XSS via Place Categories
CVE-2026-14553 Zportals < 6.3.4 - Subscriber+ Arbitrary File Upload
CVE-2026-15210 Login/Signup with Phone Number, OTP Verification < 1.8.71 - Unauthenticated Account Takeov
CVE-2026-15230 YayPricing < 3.5.7 - Subscriber+ Pricing Configuration Modification and Coupon Code Disclo
CVE-2026-15372 WP 2FA < 4.1.0 - Two-Factor Authentication Bypass via Passkeys Provider
CVE-2026-15360 Ajax Load More < 8.0.1 - Unauthenticated SQL Injection via custom_args
CVE-2026-16940 Custom Fields for WooCommerce < 1.5.1 - Unauthenticated Arbitrary File Deletion via Path T
CVE-2026-16981 DHL for WooCommerce < 4.0.1 - Unauthenticated Shipping Label Download via IDOR
CVE-2026-16561 Sunshine Photo Cart < 3.6.12 - Unauthenticated Private Gallery Comment Disclosure
CVE-2026-16968 GeoDirectory < 2.8.168 - Contributor+ User Email Disclosure via geodir_json_search_users
CVE-2026-16942 WP Custom HTML Pages <= 0.6.2 - Author+ Stored XSS
CVE-2026-16603 Content Protector (Passster) < 4.3.6 - Unauthenticated Category-Locked Content Disclosure
CVE-2026-16736 User Registration & Membership < 5.2.6 - Unauthenticated Account Creation While Registrati
CVE-2026-16613 GDPR Cookie Compliance < 5.1.0 - Cookie Deletion and Forced Logout via CSRF
CVE-2026-16746 MultiVendorX < 5.0.11 - Store Owner+ Cross-Store Commission Data Disclosure via commission
CVE-2026-16605 MultiVendorX < 5.0.11 - Store Owner+ Cross-Vendor Store Takeover and Deletion via Missing

Showing top 20 of 24 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Passster
Same vendor: Unknown

V. Comments for CVE-2026-16604

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