CVE-2018-25308 in Buddypress Xprofile Custom Fields Type
Summary
by MITRE • 04/29/2026
BuddyPress Xprofile Custom Fields Type 2.6.3 contains a remote code execution vulnerability that allows authenticated users to delete arbitrary files by manipulating unescaped POST parameters. Attackers can modify the field_hiddenfile and field_deleteimg parameters during profile editing to unlink files from the server.
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Analysis
by VulDB Data Team • 05/18/2026
This vulnerability exists within BuddyPress Xprofile Custom Fields Type version 2.6.3, representing a critical remote code execution flaw that can be exploited by authenticated users. The security issue stems from insufficient input validation and improper parameter sanitization within the profile editing functionality. Attackers with valid user credentials can manipulate specific POST parameters to execute arbitrary file deletion operations on the affected server. The vulnerability specifically targets the field_hiddenfile and field_deleteimg parameters, which are processed without adequate escaping or validation mechanisms. When these parameters are manipulated during profile editing, the application fails to properly sanitize the input before executing file system operations, creating a path traversal condition that allows attackers to unlink files from the server's file system.
The technical implementation of this vulnerability follows a classic pattern of insecure parameter handling that can be categorized under CWE-77 and CWE-94 within the Common Weakness Enumeration framework. The flaw represents a direct consequence of inadequate input validation where user-supplied data flows directly into system commands without proper sanitization. This type of vulnerability falls under the ATT&CK technique T1059.001 for command and script injection, as the malicious parameters can be used to manipulate system operations through the profile editing interface. The authenticated nature of the exploit means that attackers need only valid user credentials to potentially compromise the system, making this vulnerability particularly dangerous in environments where user access is not strictly controlled.
The operational impact of this vulnerability extends beyond simple file deletion to potentially enable more sophisticated attacks. An attacker could leverage this flaw to remove critical system files, disable security modules, or create conditions that facilitate further exploitation. The ability to unlink files from the server creates opportunities for service disruption, data corruption, or even privilege escalation if the deleted files include critical application components or configuration data. The vulnerability affects the integrity and availability of the entire BuddyPress installation, potentially compromising user data and system stability. Organizations using this plugin version may experience unauthorized access to sensitive data, system downtime, and potential compliance violations due to the lack of proper file system access controls.
Mitigation strategies should focus on immediate patching of the vulnerable plugin to version 2.6.4 or later, which addresses the input validation issues through proper parameter sanitization. Administrators should implement strict input validation and output encoding for all user-supplied parameters, particularly those related to file system operations. The recommended approach includes applying the principle of least privilege by restricting file system access permissions for the web application and implementing comprehensive monitoring for unusual file deletion patterns. Network-level protections such as web application firewalls can help detect and block malicious parameter manipulation attempts. Additionally, organizations should conduct regular security audits of their plugins and themes to identify similar vulnerabilities, implement proper access controls, and establish incident response procedures that include monitoring for unauthorized file system modifications. The vulnerability demonstrates the critical importance of proper input validation in web applications and highlights the need for comprehensive security testing of all user-facing interfaces that interact with system resources.