CVE-2026-65540 in Popup for CF7 with Sweet Alert Plugin
Summary
by MITRE • 07/23/2026
Unauthenticated Cross Site Request Forgery (CSRF) in Popup for CF7 with Sweet Alert <= 1.6.5 versions.
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Analysis
by VulDB Data Team • 07/23/2026
This vulnerability represents an unauthenticated cross site request forgery flaw affecting the Contact Form 7 plugin when used in conjunction with the Sweet Alert extension, specifically impacting versions up to and including 1.6.5. The issue arises from insufficient validation of incoming requests, allowing malicious actors to exploit the popup functionality to execute unauthorized actions on behalf of authenticated users. The vulnerability stems from the absence of proper anti-CSRF tokens or request origin verification mechanisms within the plugin's AJAX handling routines. Attackers can craft malicious requests that leverage the legitimate user's browser session to perform actions such as form submissions, data modifications, or other operations that the user is authorized to execute. This creates a significant risk as it bypasses the normal authentication and authorization checks that should prevent unauthorized access to sensitive functions. The flaw operates at the application layer and can be classified under CWE-352, which specifically addresses cross site request forgery vulnerabilities in web applications.
The technical implementation of this vulnerability exploits the trust relationship between the user's browser and the web application, particularly when the Sweet Alert popup functionality is utilized for form submissions or other interactive elements. When a user interacts with a form that employs the plugin's popup features, the malicious actor can manipulate the request parameters to trigger unintended actions on the server side. The vulnerability becomes particularly dangerous in environments where users have elevated privileges or access to sensitive data, as the attacker can leverage these permissions through the compromised session. This issue directly relates to ATT&CK technique T1566 which involves social engineering through malicious web content that exploits user trust relationships with web applications.
The operational impact of this vulnerability extends beyond simple data theft or modification, potentially enabling full account compromise when users with administrative privileges interact with affected forms. An attacker could exploit this flaw to submit spam messages, modify form configurations, or even gain access to sensitive backend functionality if the plugin's interface exposes such capabilities. The unauthenticated nature means that attackers do not need valid credentials to exploit the vulnerability, making it particularly dangerous in scenarios where users are logged into privileged accounts. Organizations running vulnerable versions of this plugin face significant risk of unauthorized data manipulation and potential service disruption.
Mitigation strategies should prioritize immediate patching to versions 1.6.6 or later where the CSRF protections have been implemented. Administrators must conduct thorough audits of all installations to identify affected versions and ensure proper update procedures are followed. Additional defensive measures include implementing Content Security Policy headers that restrict cross origin requests, enabling proper CSRF token validation mechanisms, and conducting regular security assessments of third party plugins. Network monitoring should be enhanced to detect unusual patterns in form submission activities that might indicate exploitation attempts. Organizations should also consider implementing web application firewalls to provide additional layers of protection against such attacks while maintaining comprehensive logging and alerting systems to identify potential exploitation attempts. The vulnerability highlights the importance of proper input validation and request origin verification in all web application components, particularly those handling user interactions through AJAX requests or popup interfaces.