CVE-2008-4769 in WordPress
Summary
by MITRE
Directory traversal vulnerability in the get_category_template function in wp-includes/theme.php in WordPress 2.3.3 and earlier, and 2.5, allows remote attackers to include and possibly execute arbitrary PHP files via the cat parameter in index.php. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 12/03/2025
The vulnerability identified as CVE-2008-4769 represents a critical directory traversal flaw within WordPress core functionality that specifically affects versions 2.3.3 and earlier, as well as version 2.5. This security weakness resides in the get_category_template function located within the wp-includes/theme.php file, which forms a fundamental component of WordPress's theme handling architecture. The vulnerability manifests when the cat parameter in index.php is manipulated, creating an opportunity for remote attackers to exploit the system's file inclusion mechanisms. The flaw stems from inadequate input validation and sanitization of user-supplied parameters that are directly used in file path construction without proper boundary checks or authorization verification. This type of vulnerability falls under the Common Weakness Enumeration category CWE-22, which specifically addresses Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal or directory traversal attacks. The attack vector allows adversaries to manipulate the cat parameter to traverse the filesystem and potentially include arbitrary PHP files, which could lead to remote code execution or unauthorized access to sensitive system resources.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates a pathway for attackers to execute malicious code on vulnerable WordPress installations. When an attacker successfully exploits this vulnerability, they can leverage the directory traversal mechanism to include files from locations outside the intended web root directory, potentially gaining access to system files, configuration data, or other sensitive resources. The implications are particularly severe given that WordPress was widely used for content management and many installations were running the vulnerable versions at the time of discovery. Attackers could potentially include malicious PHP scripts that would execute with the privileges of the web server, leading to complete system compromise. This vulnerability also aligns with ATT&CK technique T1505.003, which covers the use of web shell techniques through directory traversal, and T1059.007, which involves the execution of scripts through PHP. The attack scenario typically involves crafting a malicious cat parameter value that includes directory traversal sequences such as ../ or ..\ to navigate to arbitrary locations within the filesystem, then selecting a file that will be included and executed by the vulnerable WordPress application.
Mitigation strategies for CVE-2008-4769 must focus on immediate patching and implementation of proper input validation controls. The most effective remediation involves upgrading to WordPress versions 2.6 or later, where this vulnerability has been addressed through improved parameter validation and sanitization. Organizations should implement comprehensive patch management procedures to ensure all WordPress installations are running current, secure versions. Additionally, administrators should apply input validation measures at multiple layers, including web application firewalls that can detect and block suspicious directory traversal patterns in URL parameters. The implementation of proper access controls and file permission settings can also limit the damage potential by restricting what files can be accessed through the web server. Security configurations should include disabling unnecessary PHP functions that could be exploited, such as include, require, and eval, when possible. Network-level protections through intrusion detection systems can help identify attempts to exploit this vulnerability by monitoring for characteristic directory traversal patterns in HTTP requests. Organizations should also implement regular security audits and vulnerability scanning procedures to identify and remediate similar issues across their WordPress installations. The vulnerability serves as a reminder of the critical importance of keeping content management systems updated and maintaining robust input validation practices to prevent attackers from exploiting path traversal vulnerabilities that could lead to complete system compromise.