CVE-2024-8476 in Easy PayPal Events Plugin
Summary
by MITRE • 09/25/2024
The Easy PayPal Events plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.2.1. This is due to missing or incorrect nonce validation on the wpeevent_plugin_buttons() function. This makes it possible for unauthenticated attackers to delete arbitrary posts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
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Analysis
by VulDB Data Team • 03/09/2025
The Easy PayPal Events plugin for WordPress presents a critical cross-site request forgery vulnerability that affects all versions up to and including 1.2.1. This vulnerability stems from inadequate security controls within the plugin's wpeevent_plugin_buttons() function where nonce validation is either missing or improperly implemented. The weakness creates a pathway for unauthenticated attackers to execute unauthorized actions against vulnerable WordPress installations, specifically targeting the deletion of arbitrary posts through manipulated requests. The vulnerability operates under the principle that an attacker can craft malicious requests that appear legitimate to the WordPress system, exploiting the trust relationship between the administrator and the website.
The technical flaw manifests in the absence of proper nonce verification mechanisms that should validate the authenticity of requests originating from legitimate administrative actions. Nonces serve as time-based tokens that ensure requests are intentional and authorized by the user performing the action. Without these protective measures, an attacker can construct a forged request that mimics legitimate administrative operations, potentially allowing them to delete posts, modify content, or perform other destructive actions on the WordPress site. This vulnerability directly maps to CWE-352, which describes Cross-Site Request Forgery (CSRF) weaknesses in software applications where proper validation of user requests is absent or insufficient.
The operational impact of this vulnerability extends beyond simple data loss, as it can lead to complete compromise of WordPress administrative functionality and potential reputational damage for affected organizations. An attacker requires only the ability to trick a site administrator into clicking on a malicious link to exploit this vulnerability, making it particularly dangerous in environments where administrators frequently browse external websites or receive phishing emails. The ease of exploitation means that even a basic social engineering campaign could successfully compromise vulnerable installations, potentially leading to content manipulation, data deletion, or the establishment of persistent backdoors through post deletion and subsequent content replacement.
Mitigation strategies for this vulnerability should focus on immediate patching of the Easy PayPal Events plugin to version 1.2.2 or later, which contains the necessary nonce validation fixes. Administrators should also implement additional security measures including regular security audits of installed plugins, monitoring for unauthorized changes to website content, and educating administrators about the risks of clicking on suspicious links. Network-level protections such as web application firewalls can provide additional layers of defense by detecting and blocking malicious requests attempting to exploit CSRF vulnerabilities. The ATT&CK framework categorizes this vulnerability under T1566, which describes social engineering techniques used to manipulate users into performing actions that compromise security, emphasizing the human factor component that makes this vulnerability particularly concerning for organizations without robust security awareness training programs.