CVE-2025-54696 in WPFunnels Plugin
Summary
by MITRE • 08/14/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPFunnels WPFunnels allows Stored XSS. This issue affects WPFunnels: from n/a through 3.5.26.
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Analysis
by VulDB Data Team • 06/18/2026
Cross-site scripting vulnerabilities represent one of the most pervasive and dangerous web application security flaws, with the potential to compromise user sessions and execute malicious code within the context of affected applications. The identified vulnerability in WPFunnels WPFunnels constitutes a stored cross-site scripting flaw that occurs during web page generation when input data is improperly neutralized. This particular weakness allows attackers to inject malicious scripts that persist within the application's database or storage mechanisms, making the vulnerability particularly dangerous as it can affect multiple users over time. The vulnerability affects WPFunnels versions ranging from an unspecified starting point through version 3.5.26, indicating a significant timeframe during which the application remained susceptible to this type of attack.
The technical implementation of this stored XSS vulnerability stems from inadequate input validation and output encoding mechanisms within the WPFunnels application's web page generation process. When users submit content through various input fields or forms, the application fails to properly sanitize or escape potentially malicious data before storing it in the backend systems. This stored data is subsequently retrieved and displayed on web pages without appropriate HTML encoding or context-aware output sanitization, creating an environment where attacker-controlled scripts can execute in the browsers of unsuspecting users. The flaw operates at the intersection of data input processing and output rendering, where the application does not adequately distinguish between legitimate content and potentially harmful script code.
The operational impact of this stored XSS vulnerability extends beyond simple data theft or session hijacking, encompassing a broad spectrum of potential attacks that can compromise user privacy and system integrity. An attacker could exploit this vulnerability to steal cookies, session tokens, or other sensitive user information, potentially leading to unauthorized access to user accounts or administrative privileges within the WPFunnels application. Additionally, the persistent nature of stored XSS means that malicious scripts can remain active for extended periods, continuously affecting users who interact with the vulnerable application. This vulnerability could also serve as a stepping stone for more sophisticated attacks, including phishing attempts, credential harvesting, or even the deployment of malware through browser-based exploits.
Security practitioners should address this vulnerability through multiple mitigation strategies that align with established security frameworks and best practices. The remediation approach should focus on implementing comprehensive input validation and output encoding mechanisms, particularly adhering to the principles outlined in the CWE-79 category for cross-site scripting vulnerabilities. Organizations should implement proper HTML escaping and context-aware output encoding for all user-supplied data before rendering it in web pages, ensuring that potentially dangerous characters are properly encoded or removed. Additionally, the application should employ Content Security Policy headers to limit script execution and prevent unauthorized code from running within the application context. Regular security testing, including automated scanning and manual penetration testing, should be conducted to identify similar vulnerabilities throughout the application codebase, following ATT&CK framework methodologies for identifying and addressing web application attack vectors. The most effective long-term solution involves implementing secure coding practices and conducting regular security training for development teams to prevent similar issues from emerging in future releases.