CVE-2024-4383

MEDIUM 6.4

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

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	wpinsider-1
Product	simple membership
Published	May 9, 2024
Last Updated	Apr 8, 2026

Stay Ahead of the Next One

Get instant alerts for wpinsider-1 simple membership

Be the first to know when new medium vulnerabilities affecting wpinsider-1 simple membership are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

wpinsider-1 / Simple Membership

0 ≤ 4.4.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/56fdbf80-8ea2-412a-b166-b7c27de88e70?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.4.3/classes/shortcode-related/class.swpm-shortcodes-handler.php#L228 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3081024/simple-membership/trunk/classes/shortcode-related/class.swpm-shortcodes-handler.php?old=3010737&old_path=%2Fsimple-membership%2Ftrunk%2Fclasses%2Fshortcode-related%2Fclass.swpm-shortcodes-handler.php

Credits

wesley