CVE-2025-50881 in Flow
Summary
by MITRE • 03/16/2026
The `flow/admin/moniteur.php` script in Use It Flow administration website before 10.0.0 is vulnerable to Remote Code Execution. When handling GET requests, the script takes user-supplied input from the `action` URL parameter, performs insufficient validation, and incorporates this input into a string that is subsequently executed by the `eval()` function. Although a `method_exists()` check is performed, it only validates the part of the user input *before* the first parenthesis `(`, allowing an attacker to append arbitrary PHP code after a valid method call structure. Successful exploitation allows an unauthenticated or trivially authenticated attacker to execute arbitrary PHP code on the server with the privileges of the web server process.
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Analysis
by VulDB Data Team • 03/22/2026
The vulnerability identified as CVE-2025-50881 represents a critical remote code execution flaw within the Use It Flow administration website platform affecting versions prior to 10.0.0. This security weakness exists in the `flow/admin/moniteur.php` script which processes GET requests and handles user-supplied input through the `action` URL parameter. The flaw demonstrates poor input validation practices that create an exploitable path for malicious actors to execute arbitrary code on the target server. The vulnerability stems from insufficient sanitization of user-provided data before it is incorporated into executable code segments, specifically within the context of PHP's eval() function which poses inherent risks when handling untrusted input. The security implications extend beyond simple code execution as this flaw allows attackers to potentially escalate privileges and gain full control over the affected system.
The technical implementation of this vulnerability involves a flawed validation mechanism that only examines the portion of user input preceding the first parenthesis character. This partial validation approach creates a dangerous gap where attackers can append malicious PHP code after legitimate method calls, effectively bypassing the security check performed by method_exists(). The method_exists() function validates that a given method exists within the class but fails to prevent the injection of additional code following the valid method structure. This design flaw enables attackers to construct payloads where the initial part of their input passes validation while the appended code remains unfiltered and executable. The vulnerability directly maps to CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and specifically relates to improper input validation leading to code execution. The attack vector requires minimal authentication effort as the vulnerability is accessible to unauthenticated users, making it particularly dangerous in production environments.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete control over the web server's execution environment with the privileges of the web server process. Successful exploitation can result in data breaches, system compromise, and potential lateral movement within network infrastructure. Attackers can leverage this vulnerability to install backdoors, exfiltrate sensitive data, modify website content, or use the compromised server as a launchpad for further attacks. The vulnerability's accessibility to unauthenticated users means that it can be exploited at scale without requiring advanced privileges or specialized tools. This makes it particularly attractive to automated attack frameworks and malicious actors seeking to exploit widely deployed software versions. The web server process privileges typically limit the scope of damage but still provide access to all files and processes accessible through the web server's permissions, potentially enabling attackers to access database credentials, user information, and other sensitive system components.
Mitigation strategies for CVE-2025-50881 require immediate action to address the root cause of the vulnerability through proper input validation and sanitization. The primary recommendation involves updating the affected Use It Flow administration website to version 10.0.0 or later where the vulnerability has been patched. Organizations should implement comprehensive input validation that thoroughly sanitizes all user-supplied data before any execution occurs, particularly when dealing with dynamic code evaluation scenarios. The use of eval() functions should be eliminated or strictly controlled through proper parameter validation and whitelisting mechanisms. Additionally, implementing proper access controls and authentication measures can help reduce the attack surface, though these measures are secondary to addressing the core code injection vulnerability. Network-level protections such as web application firewalls and intrusion detection systems can provide additional layers of defense, though they should not be relied upon as the sole mitigation strategy. The vulnerability's classification under ATT&CK technique T1059.007, "Command and Scripting Interpreter: PowerShell," highlights the need for comprehensive monitoring and logging of command execution activities within the affected environment, as this type of vulnerability often results in the execution of malicious commands that can be detected through proper security monitoring procedures.