Passster <= 4.2.6.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via content_protector Shortcode

6.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2024-2026
CVSS 6.4 (Medium)
Publicly Published April 4, 2024
Last Updated April 15, 2024
Researcher Krzysztof Zając - CERT PL

Description

The Passster plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's content_protector shortcode in all versions up to, and including, 4.2.6.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

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Vulnerability Details for Passster – Password Protect Pages and Content

Software Type Plugin
Software Slug content-protector (view on wordpress.org)
Patched? Yes
Remediation Update to version 4.2.6.5, or a newer patched version
Affected Version
  • <= 4.2.6.4
Patched Version
  • 4.2.6.5

Recent vulnerabilities in Passster – Password Protect Pages and Content

# Title CVE ID CVSS Researchers Date
1 Passster <= 4.2.25 - Missing Authorization CVE-2026-25036 4.3 johska February 12, 2026
2 Passster – Password Protect Pages and Content <= 4.2.24 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVE-2025-14865 6.4 Muhammad Yudha - DJ January 27, 2026
3 Passster <= 4.2.19 - Unauthenticated Information Exposure CVE-2025-64218 5.3 Que Thanh Tuan - Blue Rock November 12, 2025
4 Passster <= 4.2.18 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2025-57926 6.4 Que Thanh Tuan - Blue Rock September 22, 2025
5 Passster – Password Protect Pages and Content <= 4.2.10 - Unauthenticated Content Restriction Bypass to Sensitive Information Exposure CVE-2024-11282 5.3 Francesco Carlucci January 6, 2025
6 Passster – Password Protect Pages and Content <= 4.2.6.2 - Missing Authorization to Sensitive Information Exposure CVE-2024-0616 5.3 Francesco Carlucci February 8, 2024
7 Freemius SDK <= 2.5.9 - Reflected Cross-Site Scripting via fs_request_get CVE-2023-33999 6.1 Rafie Muhammad July 18, 2023
8 Passster – Password Protection <= 3.5.5.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVE-2021-24837 6.4 apple502j December 29, 2022
9 Passster <= 3.5.5.8 - Missing Authentication leading to Sensitive Information Disclosure (Private Post Leakage) CVE-2021-24881 5.3 dc11 December 29, 2022
10 Passster <= 3.5.5.5.1 - Insecure Password Storage to Sensitive Data Exposure CVE-2022-3206 5.3 Raad Haddad September 21, 2022

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