CVE-2018-9205 in avatar_uploader
Summary
by MITRE
Vulnerability in avatar_uploader v7.x-1.0-beta8 , The code in view.php doesn't verify users or sanitize the file path.
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Analysis
by VulDB Data Team • 04/28/2025
The vulnerability identified as CVE-2018-9205 affects the avatar_uploader module version 7.x-1.0-beta8 within the Drupal content management system. This issue stems from inadequate input validation and sanitization practices in the view.php file, creating a potential security risk for affected systems. The vulnerability represents a critical flaw in the module's access control mechanisms and file handling procedures, potentially allowing unauthorized users to manipulate file paths and access restricted resources.
The technical flaw manifests in the view.php script where the application fails to properly authenticate user credentials and validate file paths before processing. This absence of verification creates an opportunity for attackers to exploit the module by manipulating file path parameters, potentially leading to unauthorized file access or directory traversal attacks. The vulnerability specifically relates to the lack of proper authorization checks and input sanitization, which are fundamental security controls that should prevent malicious users from bypassing normal access restrictions.
From an operational perspective, this vulnerability exposes systems to several potential attack vectors including arbitrary file access, directory traversal, and possibly remote code execution depending on the server configuration. The impact extends beyond simple data exposure as it could enable attackers to escalate privileges, access sensitive system files, or potentially gain control over the affected Drupal installation. Organizations running vulnerable versions of the avatar_uploader module face significant risk of unauthorized access to user data and system resources.
The vulnerability aligns with CWE-22 Directory Traversal and CWE-285 Improper Authorization, both of which are commonly exploited in web application attacks. According to ATT&CK framework, this weakness maps to T1078 Valid Accounts and T1566 Phishing techniques as attackers may leverage this vulnerability to gain unauthorized access to user accounts and system resources. The lack of proper input validation and access controls creates an environment where attackers can exploit the system's trust in user-provided data.
Mitigation strategies should include immediate upgrading to a patched version of the avatar_uploader module, implementing proper input validation and sanitization procedures, and establishing robust access control mechanisms. Organizations should also consider implementing web application firewalls, conducting regular security audits, and ensuring proper user authentication protocols are in place. Additionally, system administrators should monitor for unauthorized access attempts and implement least privilege principles to limit potential damage from exploitation attempts. The vulnerability underscores the importance of proper code review processes and security testing during software development lifecycle to prevent similar issues in future implementations.