CVE-2026-12739 in WP Easy Pay Plugin
Summary
by MITRE • 09/18/2026
The WP Easy Pay – Payment and Donation form Builder for Square plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.5.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to permanently delete arbitrary posts, pages, and custom post types (bypassing the trash via force deletion) or change any published post to draft status.
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Analysis
by VulDB Data Team • 09/18/2026
The vulnerability identified in WP Easy Pay – Payment and Donation form Builder for Square versions up to 4.5.0 represents a critical authorization bypass flaw within the WordPress ecosystem. This security defect stems from an insufficient verification of user permissions when executing administrative actions, specifically regarding content management operations. The root cause lies in the plugin's failure to properly validate whether the authenticated user possesses the necessary capabilities to perform specific destructive or modifying tasks on posts and pages. In a secure implementation, any action that alters or removes data should require explicit checks against the current user’s role and associated permissions defined by WordPress core functions such as current_user_can. The absence of these rigorous checks allows users with lower-level access privileges to execute commands intended for higher-privileged roles, fundamentally breaking the principle of least privilege which is central to web application security architectures.
From a technical perspective, this flaw enables authenticated attackers who hold subscriber-level access or any role above it to manipulate content in ways that are typically restricted to administrators or editors. The attacker can permanently delete arbitrary posts, pages, and custom post types without these items being moved to the trash bin first. This bypass of the standard WordPress trash mechanism is particularly dangerous because it eliminates the opportunity for recovery through the administrative interface, leading to immediate and irreversible data loss. Furthermore, the vulnerability allows attackers to change any published post or page to draft status effectively taking content offline without authorization. These actions are performed via force deletion methods that do not trigger the usual safety checks associated with standard delete operations in WordPress plugins.
The operational impact of this vulnerability is severe for website owners and their audiences. The ability to permanently delete arbitrary content means that an attacker can cause significant disruption by removing critical information, product pages, or donation forms hosted on the site. This constitutes a denial of service condition as well as potential data integrity compromise depending on the nature of the deleted content. Additionally, changing published posts to draft status effectively removes them from public view, which can be used for defacement purposes or to hide malicious changes made by other compromised accounts. Since this requires only subscriber-level access, it is relatively easy for attackers who have obtained low-privilege credentials through phishing, credential stuffing, or leaked databases to exploit this flaw and escalate their impact on the website’s integrity and availability.
This vulnerability aligns with Common Weakness Enumeration (CWE) ID 269, which describes Improper Privilege Management, specifically where a user is able to perform actions beyond their assigned privileges. It also relates closely to CWE-862 regarding Missing Authorization checks in critical code paths. In the context of the MITRE ATT&CK framework for enterprise security, this behavior maps to techniques involving privilege escalation and unauthorized access to resources. Attackers often leverage such flaws after gaining initial foothold through lower-level accounts to expand their control over the system environment. The specific action of force-deleting content without using the trash can be categorized under resource destruction tactics aimed at disrupting business operations or covering tracks by removing evidence of prior compromise activities if combined with other malicious actions.
To mitigate this risk, immediate remediation is required for all installations running version 4.5.0 and below of the WP Easy Pay plugin. Site administrators should update to the latest patched version released by the vendor as soon as possible. Until an official patch is available or applied, it is advisable to restrict user roles on WordPress sites that use this plugin, ensuring that only trusted individuals with administrator-level privileges have access to areas where such actions might be triggered inadvertently through vulnerable endpoints if they exist in other parts of the site architecture. Implementing strict input validation and enforcing capability checks using standard WordPress functions like current_user_can before executing any delete or update operations on post objects is essential for preventing similar issues. Regular security audits and penetration testing focusing on authorization logic can help identify such flaws early in the development lifecycle, ensuring that plugins adhere to secure coding standards and do not expose core functionalities to unauthorized users.