CVE-2026-110367 in APIExperts Square Plugin
Summary
by MITRE • 10/15/2026
Missing Authorization vulnerability in WPExperts APIExperts Square for WooCommerce woosquare allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects APIExperts Square for WooCommerce: from n/a through 4.7.5.
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Analysis
by VulDB Data Team • 10/15/2026
The identified security flaw resides within the APIExperts Square for WooCommerce plugin, specifically affecting versions ranging from an unspecified initial release up to version 4.7.5. This vulnerability is classified as a Missing Authorization issue, which fundamentally represents a failure in implementing proper access control mechanisms on server-side resources. In web application architecture, authorization checks are critical for ensuring that authenticated users can only perform actions and access data appropriate to their assigned role or privilege level. When these controls are incorrectly configured or entirely absent, the application fails to verify whether the current user has sufficient permissions before executing sensitive operations. This specific weakness allows attackers who have valid credentials but lower-level privileges, such as standard customers or subscribers, to escalate their rights and perform administrative functions intended exclusively for site administrators.
From a technical perspective, this vulnerability typically manifests when API endpoints exposed by the plugin do not adequately validate the user's role against the required permission level before processing requests. An attacker can exploit this flaw by crafting specific HTTP requests that target internal management features of WooCommerce or Square integration settings. Because the application does not enforce strict access control policies on these endpoints, it processes commands such as modifying payment gateway configurations, viewing sensitive transaction data, or altering store settings without verifying if the requester holds administrative privileges. This behavior aligns directly with CWE-269, which defines Improper Privilege Control, and is further contextualized by MITRE ATT&CK technique T1078, Valid Accounts, where attackers leverage legitimate credentials to bypass security boundaries due to insufficient authorization checks on specific application functions.
The operational impact of this vulnerability is significant for e-commerce businesses relying on WooCommerce and Square integrations. By exploiting the missing authorization controls, an attacker can gain unauthorized access to critical business logic and sensitive data. This may include viewing customer payment information, modifying shipping or tax rules, changing product inventory levels, or altering financial reconciliation settings linked to the Square account. Such actions compromise the confidentiality of customer data, potentially violating privacy regulations like GDPR or PCI DSS depending on the specific data accessed. Furthermore, the integrity of the e-commerce platform is undermined as attackers can manipulate store configurations leading to operational disruptions, financial loss through fraudulent transactions, or reputational damage due to compromised trust in the security posture of the online store.
To mitigate this risk, immediate action must be taken by administrators using affected versions of APIExperts Square for WooCommerce. The primary remediation step is to upgrade the plugin to version 4.7.6 or any later release where these authorization checks have been properly implemented and validated. Until an update is applied, site owners should consider restricting access to WordPress admin areas through IP whitelisting if possible and ensuring that all user accounts with administrative privileges are secured with strong passwords and multi-factor authentication. Additionally, implementing a Web Application Firewall can help detect and block suspicious request patterns associated with privilege escalation attempts, providing an additional layer of defense against exploitation while the underlying code vulnerability remains unpatched in older versions.