CVE-2024-43241 in Ultimate Membership Pro Plugin
Summary
by MITRE • 08/19/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in azzaroco Ultimate Membership Pro indeed-membership-pro.This issue affects Ultimate Membership Pro: from n/a through <= 12.7.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 04/02/2026
This cross-site scripting vulnerability exists within the azzaroco Ultimate Membership Pro plugin for WordPress, specifically impacting versions up to and including 12.7. The flaw resides in the improper neutralization of input during web page generation processes, creating a pathway for malicious actors to inject arbitrary script code into web pages viewed by other users. This vulnerability falls under CWE-79 which specifically addresses cross-site scripting attacks where input validation and output encoding mechanisms fail to properly sanitize user-supplied data before rendering it within web pages. The issue manifests when the plugin processes user input through membership registration forms, profile updates, or other interactive elements without adequate sanitization measures.
The operational impact of this vulnerability is significant as it allows attackers to execute malicious scripts in the context of affected websites, potentially leading to session hijacking, credential theft, or unauthorized access to membership areas. Attackers could exploit this weakness by submitting malicious payloads through forms or parameters that the plugin processes, which are then reflected back to other users browsing the site. The vulnerability affects the core membership functionality of the plugin, making it particularly dangerous for websites that rely heavily on user registration and membership management features. This type of attack aligns with ATT&CK technique T1531 which involves the use of malicious scripts to manipulate web applications and gain unauthorized access to user sessions.
Mitigation strategies should focus on immediate patching of the affected plugin to version 12.8 or later where the XSS vulnerability has been addressed. Administrators should also implement comprehensive input validation and output encoding mechanisms throughout the plugin's codebase, ensuring that all user-supplied data is properly sanitized before being processed or displayed. Additional protective measures include implementing Content Security Policy headers, using proper escaping functions for HTML output, and conducting regular security audits of custom plugin code. Organizations should also consider implementing web application firewalls to detect and block malicious script injection attempts, while maintaining up-to-date security monitoring to identify potential exploitation attempts. The vulnerability demonstrates the critical importance of input validation in web applications and the potential consequences of inadequate sanitization of user data in membership and authentication systems.