CVE-2018-16299 in Localize My Post Plugin
Summary
by MITRE
The Localize My Post plugin 1.0 for WordPress allows Directory Traversal via the ajax/include.php file parameter.
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Analysis
by VulDB Data Team • 08/20/2025
The vulnerability identified as CVE-2018-16299 resides within the Localize My Post plugin version 1.0 for WordPress, representing a critical directory traversal flaw that exposes systems to unauthorized file access. This issue manifests through the ajax/include.php file parameter, which fails to properly validate user input, creating an avenue for malicious actors to navigate the file system beyond intended boundaries. The vulnerability falls under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The technical implementation of this flaw occurs when the plugin processes the ajax/include.php endpoint without adequate sanitization of the file parameter. An attacker can manipulate this parameter to include arbitrary file paths, potentially accessing sensitive files such as configuration files, database credentials, or other system resources that should remain protected. The vulnerability enables attackers to read files that are not intended to be publicly accessible, including but not limited to wp-config.php, which typically contains database connection details and cryptographic keys. This weakness directly violates the principle of least privilege and can lead to complete system compromise when combined with other exploitation techniques.
The operational impact of CVE-2018-16299 extends beyond simple information disclosure, as it can facilitate further attacks within the compromised WordPress environment. Once an attacker successfully exploits this vulnerability, they may gain access to administrative credentials, plugin configurations, or other sensitive data stored on the server. The attack surface is particularly concerning given that WordPress plugins represent common targets for exploitation due to their widespread use and varying levels of security implementation. This vulnerability can be leveraged to establish persistent access to the affected system, potentially enabling data exfiltration, system modification, or even lateral movement within network environments where the compromised WordPress instance resides. The attack vector aligns with techniques described in the MITRE ATT&CK framework under T1059 for command and scripting interpreter and T1213 for data from information repositories, demonstrating how directory traversal can serve as a foundational attack technique.
Mitigation strategies for this vulnerability must be implemented immediately upon discovery of affected systems. The primary remediation involves updating the Localize My Post plugin to a version that properly validates and sanitizes input parameters, ensuring that file paths are restricted to intended directories only. Administrators should also implement proper input validation measures, including whitelisting acceptable file paths and rejecting any input containing directory traversal sequences such as ../ or ..\\. Network-level protections can include implementing web application firewalls that monitor for suspicious path traversal patterns and blocking requests containing known malicious sequences. Additionally, system administrators should conduct comprehensive security audits of all installed WordPress plugins to identify similar vulnerabilities, as this type of flaw often indicates broader security issues within plugin implementations. Regular security updates and patch management processes should be enforced to prevent similar vulnerabilities from being introduced into the system environment. The vulnerability demonstrates the critical importance of input validation and proper access controls in web applications, particularly those handling user-provided parameters in file system operations, and serves as a reminder of the potential consequences when such fundamental security measures are omitted from plugin development practices.