CVE-2026-27062 in WPFunnels Plugin
Summary
by MITRE • 10/29/2026
Cross-Site Request Forgery (CSRF) vulnerability in WPFunnels Team WPFunnels wpfunnels allows Cross Site Request Forgery.This issue affects WPFunnels: from n/a through 3.13.5.
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Analysis
by VulDB Data Team • 10/29/2026
The identified security flaw represents a classic Cross-Site Request Forgery (CSRF) vulnerability within the WPFunnels plugin for WordPress, specifically affecting versions ranging from initial releases up to version 3.13.5. CSRF attacks exploit the trust that a web application has in a user's browser by tricking the victim into submitting a malicious request they did not intend. In this context, an attacker can craft a deceptive webpage or email containing a hidden form or image tag that triggers state-changing actions within WPFunnels when accessed by an authenticated administrator or user with sufficient privileges. Because WordPress and its plugins often rely on session cookies for authentication without requiring explicit re-authentication for every action, the browser automatically includes these credentials in any request made to the domain, allowing the malicious payload to execute administrative functions such as modifying funnel settings, creating new funnels, or altering payment configurations without the user's knowledge.
From a technical perspective, this vulnerability stems from insufficient validation of the Origin header and the absence of anti-CSRF tokens for sensitive state-changing operations within the plugin’s AJAX handlers or form submissions. The CWE classification for this issue is primarily CWE-352: Cross-Site Request Forgery (CSRF), which highlights the failure to verify that a request originated from an authorized source. Furthermore, if the vulnerability allows for unauthorized modification of funnel structures or integration settings, it may also intersect with CWE-601: URL Redirection to Untrusted Site ('Open Redirect') depending on how the forged requests manipulate redirect parameters, though the core issue remains the lack of request origin verification and token-based protection mechanisms. The operational impact is significant because WPFunnels manages critical e-commerce conversion paths; an attacker could disrupt sales funnels by deleting or corrupting funnel data, inject malicious tracking codes to steal customer information, or alter payment gateway configurations to divert funds. This undermines the integrity of the business logic managed by the plugin and can lead to substantial financial loss and reputational damage for site owners who rely on these automated workflows.
Mitigation strategies must focus on implementing robust anti-CSRF protections at both the application code level and server configuration level. Developers should ensure that all state-changing requests include a unique, unpredictable CSRF token that is validated against the user's session before processing any action. Additionally, verifying the HTTP Origin header or Referer header can provide an additional layer of defense by ensuring requests originate from expected domains. For site administrators using affected versions, immediate steps should include updating WPFunnels to version 3.13.6 or later where this vulnerability has been patched. In environments where updates are not immediately feasible, implementing Web Application Firewall rules that monitor for anomalous POST request patterns and enforcing strict Content Security Policy headers can help mitigate the risk of exploitation by blocking unauthorized cross-origin requests. Regular security audits and adherence to OWASP guidelines for session management and state change protection are essential to prevent similar vulnerabilities in future development cycles.