CVE-2026-31919 in Advanced Coupons for WooCommerce Coupons Plugin
Summary
by MITRE • 03/13/2026
Missing Authorization vulnerability in Josh Kohlbach Advanced Coupons for WooCommerce Coupons advanced-coupons-for-woocommerce-free allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Advanced Coupons for WooCommerce Coupons: from n/a through <= 4.7.1.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 03/20/2026
The vulnerability identified as CVE-2026-31919 represents a critical missing authorization flaw within the Advanced Coupons for WooCommerce Coupons plugin, specifically impacting versions ranging from the initial release through version 4.7.1. This security weakness resides in the plugin's access control mechanisms, creating a scenario where unauthorized users can exploit incorrectly configured security levels to gain elevated privileges or access restricted functionality. The issue manifests as a failure in proper authorization checks, allowing malicious actors to bypass intended access controls that should restrict coupon management operations to authorized administrators only.
This vulnerability directly maps to CWE-285, which describes improper authorization conditions in software systems. The flaw stems from inadequate validation of user permissions within the plugin's coupon management interface, where the system fails to properly verify whether the requesting user possesses sufficient privileges to perform specific coupon-related operations. The incorrectly configured access control security levels create a path for privilege escalation attacks, where unauthenticated or low-privileged users might be able to manipulate coupon codes, modify existing discounts, or create new promotional offers without proper authorization. The vulnerability exists in the plugin's backend processing logic where access control checks are either missing entirely or implemented incorrectly, allowing unauthorized access to administrative functions.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables attackers to manipulate the e-commerce platform's promotional pricing structure. An attacker could potentially create unlimited discount codes, modify existing coupon values, or disable promotional campaigns, directly affecting revenue streams and customer experience. The vulnerability affects the core functionality of the WooCommerce coupon system, which is fundamental to online retail operations, making it particularly dangerous for businesses relying on dynamic pricing strategies. The implications include potential financial loss, disruption of legitimate promotional activities, and compromise of customer trust in the platform's integrity.
Security mitigations for this vulnerability require immediate attention through plugin updates to versions that properly implement authorization checks. Organizations should ensure that all instances of the Advanced Coupons for WooCommerce plugin are upgraded to the latest secure version, which should include proper access control validation. System administrators should also implement additional monitoring of coupon-related activities and user access patterns to detect potential exploitation attempts. The remediation process involves verifying that all user interactions with coupon management functions properly validate user roles and permissions before executing any administrative operations. Additionally, organizations should conduct security audits of their WooCommerce installations to identify other potential access control vulnerabilities and implement comprehensive access control policies that align with the principle of least privilege, ensuring that only authorized personnel can perform sensitive operations within the e-commerce platform's coupon management system.