CVE-2018-25162 in Plan Team
Summary
by MITRE • 03/06/2026
2-Plan Team 1.0.4 contains an arbitrary file upload vulnerability that allows authenticated attackers to upload executable PHP files by sending multipart form data to managefile.php. Attackers can upload PHP files through the userfile1 parameter with action=upload, which are stored in the files directory and executed by the web server for remote code execution.
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Analysis
by VulDB Data Team • 03/06/2026
The vulnerability identified as CVE-2018-25162 affects the 2-Plan Team version 1.0.4 web application, presenting a critical arbitrary file upload flaw that enables authenticated attackers to execute remote code on the affected system. This vulnerability resides within the file management functionality of the application, specifically in the managefile.php endpoint which processes file uploads through multipart form data submissions. The flaw allows attackers to bypass normal file validation mechanisms by leveraging the userfile1 parameter with action=upload, creating a pathway for malicious file execution that fundamentally compromises the application's security posture.
The technical implementation of this vulnerability stems from inadequate input validation and insufficient file type restrictions within the file upload mechanism. When an authenticated user submits a file through the designated upload endpoint, the application fails to properly validate the file extension or content type, allowing attackers to upload PHP files that contain malicious code. These uploaded files are stored in the files directory and subsequently executed by the web server, creating a direct path for remote code execution. This represents a classic insecure file upload vulnerability that aligns with CWE-434, which specifically addresses the improper restriction of uploads to a restricted directory, and CWE-22, concerning improper limitation of a pathname to a restricted directory.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with persistent access to the underlying system through the web application's execution environment. Once an attacker successfully uploads a malicious PHP file, they can execute arbitrary commands on the server, potentially leading to complete system compromise, data exfiltration, or the establishment of persistent backdoors. The authenticated nature of the attack means that attackers must first obtain valid credentials, but this requirement does not significantly mitigate the risk given that legitimate users often have access to the system and the attack can be performed by compromised accounts. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1105 (Remote File Execution) and T1059 (Command and Scripting Interpreter) categories, demonstrating how file upload flaws can be leveraged for broader exploitation campaigns.
The mitigation strategies for this vulnerability must address both the immediate technical flaw and broader security practices within the application. The primary remediation involves implementing strict file type validation that rejects executable file extensions such as .php, .jsp, .asp, and other potentially dangerous formats. Additionally, uploaded files should be stored outside the web root directory, and proper access controls should be enforced to prevent direct execution of uploaded content. Input sanitization and output encoding mechanisms should be strengthened to prevent path traversal attacks, while the application should implement random naming conventions for uploaded files to prevent predictable paths. Security headers should be configured to prevent automatic execution of uploaded files, and regular security testing including dynamic application security testing and manual penetration testing should be conducted to identify similar vulnerabilities in other application components. Organizations should also implement network segmentation and monitoring to detect unusual file upload activities that could indicate exploitation attempts.