CVE-2025-4654 in Soumettre Plugin
Summary
by MITRE • 07/02/2025
The Soumettre.fr plugin for WordPress is vulnerable to unauthorized access and modification of data due to a improper authorization checks on the make_signature function in all versions up to, and including, 2.1.5. This makes it possible for unauthenticated attackers to create/edit/delete Soumettre posts. This vulnerability affects only installations where the soumettre account is not connected (i.e. API key is not installed)
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/02/2025
The vulnerability identified as CVE-2025-4654 affects the Soumettre.fr plugin for WordPress, a widely used tool for managing submissions and forms within WordPress environments. This plugin serves as a bridge between WordPress installations and external submission systems, allowing users to process and manage form data through various integration points. The flaw resides in the make_signature function which lacks proper authorization controls, creating a critical security gap that allows unauthorized access to core submission functionalities. The vulnerability specifically impacts installations where the soumettre account remains unconnected, meaning no API key has been properly configured within the WordPress environment.
The technical implementation of this vulnerability stems from insufficient input validation and authorization checks within the plugin's core functionality. The make_signature function fails to verify whether the requesting user possesses legitimate authorization to perform data modification operations. This authorization bypass allows any unauthenticated attacker to exploit the system's submission endpoints and execute operations including creating new posts, modifying existing submissions, or deleting critical data without proper authentication. The vulnerability essentially removes all access controls for submission management functions, treating all requests equally regardless of their source or user credentials. This type of flaw aligns with CWE-285, which addresses improper authorization in software systems, and represents a classic example of insufficient access control mechanisms.
The operational impact of this vulnerability is severe for affected WordPress installations, particularly those relying on the Soumettre.fr plugin for form management and data collection. An unauthenticated attacker could potentially compromise the integrity of submission data, manipulate form results, or even disrupt normal business operations by deleting important submission records. The vulnerability affects all versions of the plugin up to and including 2.1.5, indicating that this was likely an oversight in the plugin's development lifecycle where proper security testing and authorization validation were not adequately implemented. Organizations using this plugin without proper API key configuration face significant risk of data compromise, especially in environments where submission data contains sensitive information or represents business-critical processes.
Organizations should immediately implement several mitigation strategies to address this vulnerability. The primary recommendation involves updating to the latest version of the Soumettre.fr plugin where the authorization checks have been properly implemented and validated. When updating is not immediately possible, administrators should consider implementing additional security controls such as restricting access to the plugin's endpoints through firewall rules or web application firewalls. Network-level protections can help limit exposure by blocking direct access to the vulnerable submission endpoints until proper updates are deployed. Additionally, organizations should verify that their soumettre accounts are properly configured with valid API keys, as the vulnerability only affects installations where this connection is not established. This aligns with ATT&CK technique T1078 which addresses valid accounts and credential access, as the vulnerability essentially allows attackers to bypass normal authentication requirements through flawed authorization logic rather than through credential theft or brute force attacks.
The broader implications of this vulnerability highlight the importance of proper authorization validation in web applications, particularly those handling user-submitted data. This flaw demonstrates how seemingly minor security oversights in plugin development can create significant exposure points within WordPress ecosystems. Security teams should conduct comprehensive audits of all installed plugins to identify similar authorization gaps, as many third-party plugins may contain similar vulnerabilities. The vulnerability also underscores the need for continuous security monitoring and testing of WordPress installations, particularly those using plugins that interface with external services or handle sensitive data processing. Organizations should establish procedures for regularly reviewing plugin security updates and implementing them promptly to prevent exploitation of known vulnerabilities. This case serves as a reminder that even seemingly simple functions like signature generation can become critical security points when proper authorization controls are not properly implemented.