Simple Membership <= 4.4.5 - Authenticated(Contributor+) Stored Cross-Site Scripting via Shortcode

6.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2024-4383
CVSS 6.4 (Medium)
Publicly Published May 3, 2024
Last Updated May 9, 2024
Researcher wesley (wcraft)

Description

The Simple Membership plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'swpm_paypal_subscription_cancel_link' shortcode in all versions up to, and including, 4.4.5 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 Simple Membership

Software Type Plugin
Software Slug simple-membership (view on wordpress.org)
Patched? Yes
Remediation Update to version 4.4.6, or a newer patched version
Affected Version
  • <= 4.4.5
Patched Version
  • 4.4.6

Recent vulnerabilities in Simple Membership

# Title CVE ID CVSS Researchers Date
1 Simple Membership <= 4.7.5 - Missing Authorization to Unauthenticated Arbitrary Member Account Deactivation via Forged Stripe 'charge.refunded' Webhook CVE-2026-12093 5.3 Nikita Fenko June 17, 2026
2 Simple Membership <= 4.7.2 - Unauthenticated Stored Cross-Site Scripting CVE-2026-42663 7.2 hhhai May 3, 2026
3 Simple Membership <= 4.7.1 - Missing Authorization CVE-2026-34886 5.3 Jakub Herman March 31, 2026
4 Simple Membership <= 4.7.0 - Unauthenticated Improper Handling of Missing Values CVE-2026-1461 6.5 0N0ise February 18, 2026
5 Simple Membership <= 4.6.9 - Missing Authorization CVE-2026-25308 4.3 andrea bocchetti January 19, 2026
6 Simple Membership <= 4.6.3 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2025-49333 4.4 bintable June 5, 2025
7 Simple Membership <= 4.5.5 - Exposure of Private Personal Information to an Unauthorized Actor CVE-2024-11088 5.3 Francesco Carlucci November 20, 2024
8 Simple Membership <= 4.5.3 - Unauthenticated Open Redirect CVE-2024-49682 6.1 ardias October 21, 2024
9 Simple Membership <= 4.4.3 - Authenticated(Contributor+) Stored Cross-Site Scripting via Shortcode CVE-2024-3730 5.4 Thanh Nam Tran April 24, 2024
10 Simple Membership <= 4.4.2 - Unauthenticated Stored Self-Based Cross-Site Scripting CVE-2024-1985 4.7 stealthcopter March 5, 2024

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