CVE-2026-102390 in AFFI – Affiliate Marketing for WooCommerce Plugin
Summary
by MITRE • 10/01/2026
Missing Authorization vulnerability in VillaTheme AFFI – Affiliate Marketing for WooCommerce affi-affiliate-marketing-for-woo allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects AFFI – Affiliate Marketing for WooCommerce: from n/a through 1.0.9.
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Analysis
by VulDB Data Team • 10/01/2026
The identified vulnerability represents a critical failure in access control mechanisms within the VillaTheme AFFI plugin, specifically affecting versions of AFFI – Affiliate Marketing for WooCommerce ranging from initial releases up to version 1.0.9. This flaw is categorized under CWE-284, which describes Improper Access Control, and aligns with MITRE ATT&CK technique T1078, Valid Accounts, as it allows unauthorized entities to bypass intended security restrictions. The core issue stems from the application's inability to properly verify user privileges before executing sensitive administrative functions or accessing restricted data sets related to affiliate marketing operations.
In a typical WordPress environment utilizing this plugin, authentication checks are often performed at the page load level for frontend users but may be insufficiently enforced when processing AJAX requests or direct API calls that handle backend configuration and data management. The vulnerability arises because the software does not adequately validate whether the initiating request originates from an administrator account with sufficient permissions to perform specific actions such as modifying affiliate commission structures, accessing sensitive customer data, or altering plugin settings. This misconfiguration effectively creates a broken access control scenario where lower-privileged users, including subscribers or even unauthenticated visitors depending on the specific endpoint exploited, can interact with administrative interfaces and functions that should be strictly reserved for site administrators.
The operational impact of this vulnerability is severe due to the nature of affiliate marketing plugins which often handle financial data, commission calculations, and personal information about affiliates and customers. An attacker exploiting this flaw could potentially manipulate affiliate links to redirect traffic fraudulently, alter commission rates to benefit specific accounts unfairly, or extract sensitive database records containing user emails and transaction histories. This not only compromises the confidentiality and integrity of the website's data but also poses significant reputational and financial risks to the site owner by enabling fraudulent activities within the affiliate program infrastructure.
Mitigation strategies must prioritize immediate remediation through software updates. Administrators running affected versions should upgrade AFFI – Affiliate Marketing for WooCommerce to a version later than 1.0.9 where this access control logic has been corrected. In cases where an update is not immediately feasible, temporary mitigations include restricting direct file and function execution via web server configuration rules if possible, ensuring that all administrative endpoints require strict capability checks using WordPress native functions such as current_user_can with appropriate capabilities like manage_options or edit_posts depending on the specific action. Additionally, implementing Web Application Firewall rules to monitor for anomalous patterns in AJAX request frequencies from non-administrator user agents can provide an additional layer of defense against exploitation attempts while permanent fixes are deployed.