CVE-2026-118091 in WPFunnels Plugin
Summary
by MITRE • 10/29/2026
Missing Authorization vulnerability in WPFunnels Team WPFunnels wpfunnels allows Exploiting Incorrectly Configured Access Control Security Levels.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 resides within the WPFunnels plugin, specifically affecting versions ranging from an unspecified initial release up to version 3.13.5. This vulnerability is classified as a missing authorization issue, which fundamentally represents a failure in implementing proper access control mechanisms. In web application architecture, particularly within content management systems like WordPress where plugins extend core functionality, the enforcement of user roles and permissions is critical for maintaining data integrity and system security. When an application fails to verify that a requesting user has the necessary privileges before executing sensitive operations, it creates a pathway for unauthorized actors to manipulate or access resources they should not be able to reach. This specific instance involves incorrectly configured access control levels, suggesting that while some form of authentication may exist, the subsequent authorization checks are either absent, flawed, or bypassable through crafted requests.
From a technical perspective, this vulnerability aligns with CWE-284, which describes Improper Access Control. The core issue lies in the server-side logic failing to validate user permissions against the requested action. In many WordPress plugins, administrative functions such as modifying funnel settings, accessing customer data, or changing payment configurations are often exposed via AJAX endpoints or REST API routes. If these endpoints do not strictly enforce capability checks using standard WordPress functions like current_user_can() with appropriate context and nonce verification, any authenticated user can potentially escalate their privileges. Even if the attacker is a low-privilege account such as an editor or subscriber, they may be able to execute administrative commands by manipulating request parameters. This type of flaw allows for horizontal privilege escalation among users at similar levels or vertical privilege escalation from lower-tier roles to administrators, depending on how the flawed logic is structured and what specific endpoints are exposed without proper guards.
The operational impact of this vulnerability can be severe, particularly in e-commerce environments where WPFunnels is commonly deployed. An attacker exploiting incorrect access control could gain unauthorized visibility into sensitive business data, including customer personal information, purchase history, and payment details. Beyond privacy violations, the ability to modify funnel configurations without authorization poses a direct threat to revenue generation and operational continuity. Malicious actors could alter checkout flows, remove conversion tracking pixels, or inject malicious scripts into landing pages, leading to financial loss, brand reputation damage, and potential compromise of end-user systems through cross-site scripting vectors embedded in the modified content. Furthermore, if administrative settings are altered, it may disrupt automated marketing campaigns or email sequences that rely on specific funnel structures, causing significant downtime and requiring manual intervention to restore correct configurations.
This vulnerability maps directly to several techniques within the MITRE ATT&CK framework for enterprise security. Specifically, it relates to T1078 Valid Accounts, as exploitation typically requires an existing user account with at least basic authentication privileges. The act of exploiting missing authorization falls under T1068 Exploitation for Privilege Escalation if the goal is to gain higher-level access, or more broadly within the Initial Access and Persistence tactics depending on how the vulnerability is leveraged in a broader attack chain. Attackers often use automated tools to scan for such misconfigurations by sending crafted requests that attempt to perform administrative actions with low-privilege credentials. The success of these attempts confirms the presence of an authorization bypass, allowing the attacker to operate as if they were a higher-privileged user without needing to crack passwords or exploit separate authentication flaws.
Mitigation strategies must focus on immediate remediation and long-term security hardening. For organizations currently running affected versions, upgrading WPFunnels to version 3.13.6 or later is the primary recommendation, as this release likely contains patches that enforce stricter authorization checks on all sensitive endpoints. Until an upgrade can be performed, administrators should implement compensating controls such as web application firewall rules that monitor for anomalous request patterns indicative of privilege escalation attempts. It is also advisable to review user roles and capabilities within WordPress to ensure the principle of least privilege is strictly applied, minimizing the potential impact if a lower-privileged account is compromised. Developers integrating similar functionality in custom code should audit all AJAX handlers and REST API endpoints to ensure they explicitly verify current_user_can() for every action performed, rather than relying on implicit trust or incomplete checks. Regular security audits and penetration testing focused on access control logic are essential to identify and rectify such flaws before they can be exploited by malicious actors seeking unauthorized system access.