CVE-2018-25178 in Easyndexer
Summary
by MITRE • 03/06/2026
Easyndexer 1.0 contains an arbitrary file download vulnerability that allows unauthenticated attackers to download sensitive files by manipulating the file parameter. Attackers can send POST requests to showtif.php with arbitrary file paths in the file parameter to retrieve system files like configuration and initialization files.
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Analysis
by VulDB Data Team • 03/16/2026
The vulnerability identified as CVE-2018-25178 affects Easyndexer version 1.0, a web application that suffers from a critical arbitrary file download flaw. This vulnerability resides in the showtif.php component where the application fails to properly validate or sanitize user input provided through the file parameter. The flaw allows unauthenticated attackers to exploit the application by sending crafted POST requests that manipulate the file parameter to access and download sensitive system files without proper authentication or authorization. This represents a fundamental breakdown in the application's input validation mechanisms and access control enforcement. The vulnerability is particularly concerning as it operates without requiring any authentication credentials, making it accessible to any attacker with network access to the vulnerable system.
The technical implementation of this vulnerability stems from improper input validation within the file parameter handling mechanism. When the application processes the file parameter in showtif.php, it directly uses the user-supplied value to construct file paths without adequate sanitization or validation checks. This creates a path traversal condition where attackers can manipulate the file parameter to navigate the filesystem and access files outside the intended directory structure. The vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw essentially allows attackers to bypass normal file access restrictions by crafting malicious file paths that can traverse directories and access sensitive configuration files, initialization scripts, and other system resources that should remain protected from unauthorized access.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with access to critical system information that can be leveraged for further exploitation. Successful exploitation can lead to the disclosure of sensitive files such as configuration files that may contain database credentials, API keys, application settings, and other confidential information. This information disclosure can enable attackers to gain deeper insights into the application's architecture and infrastructure, potentially facilitating more sophisticated attacks such as privilege escalation, data exfiltration, or lateral movement within the network. The vulnerability also creates opportunities for attackers to identify other potential weaknesses in the system by accessing initialization files and configuration data that may reveal system internals. According to ATT&CK framework, this vulnerability maps to T1083 (File and Directory Discovery) and T1566 (Phishing for Information) as attackers can use the information gathered to plan more targeted attacks. The lack of authentication requirements makes this a particularly dangerous vulnerability as it can be exploited remotely without requiring any prior access credentials.
Mitigation strategies for CVE-2018-25178 should focus on implementing robust input validation and access control measures. The primary fix involves sanitizing and validating all user-supplied input in the file parameter to prevent path traversal attacks, including implementing proper directory traversal prevention mechanisms and restricting file access to specific directories only. Organizations should implement a whitelist approach for file access, allowing only predefined and safe file paths to be accessed through the application. Additionally, implementing proper authentication and authorization checks can prevent unauthorized access even if the path traversal vulnerability exists. The application should also be updated to a newer version of Easyndexer that addresses this vulnerability, as version 1.0 appears to be outdated and potentially contains other unpatched security issues. Security monitoring should be enhanced to detect suspicious file access patterns and unauthorized attempts to access system files, with logging mechanisms implemented to track all file access attempts for forensic analysis. Network segmentation and firewall rules should be configured to limit access to the vulnerable application to only authorized users and systems, reducing the attack surface and potential impact of exploitation attempts.