CVE-2010-5280 in Com Cbe
Summary
by MITRE
Directory traversal vulnerability in the Community Builder Enhanced (CBE) (com_cbe) component 1.4.8, 1.4.9, and 1.4.10 for Joomla! allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the tabname parameter in a userProfile action to index.php. NOTE: this can be leveraged to execute arbitrary code by using the file upload feature.
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Analysis
by VulDB Data Team • 07/14/2025
The CVE-2010-5280 vulnerability represents a critical directory traversal flaw within the Community Builder Enhanced component for Joomla! platforms, specifically affecting versions 1.4.8, 1.4.9, and 1.4.10. This vulnerability resides in the component's handling of user input through the tabname parameter within the userProfile action of the index.php file, creating an exploitable condition that allows remote attackers to manipulate file inclusion mechanisms. The flaw stems from inadequate input validation and sanitization processes that fail to properly restrict directory traversal sequences, enabling attackers to navigate outside the intended directory structure and access arbitrary local files on the server.
The technical exploitation of this vulnerability occurs through the manipulation of the tabname parameter to include directory traversal sequences such as .. (dot dot) characters, which allows attackers to bypass normal file access controls. When the component processes this malicious input, it fails to validate or sanitize the path components, resulting in the inclusion of arbitrary local files through the PHP include or require functions. This vulnerability operates under CWE-22, which classifies directory traversal attacks as a fundamental weakness in input validation and path handling. The vulnerability's impact is amplified by the fact that it can be combined with the component's file upload functionality to achieve arbitrary code execution, transforming a simple file inclusion attack into a full remote code execution capability.
From an operational perspective, this vulnerability presents a severe risk to Joomla! installations using the affected CBE component, as it enables attackers to execute arbitrary code on the target server with the privileges of the web application. The exploitation chain typically begins with an attacker identifying the vulnerable parameter and crafting malicious input that traverses the directory structure to access sensitive files such as configuration files, database credentials, or system files. Once the directory traversal is successful, attackers can leverage the file upload feature to upload malicious PHP code, which can then be executed through the vulnerable component's file inclusion mechanism. This vulnerability aligns with ATT&CK technique T1505.003 for server-side include attacks and represents a common vector for privilege escalation and persistent access within compromised environments.
The mitigation strategies for CVE-2010-5280 should prioritize immediate component updates to versions that address the directory traversal vulnerability, as the original affected versions contain no built-in protections against such attacks. System administrators should implement input validation and sanitization measures that explicitly reject directory traversal sequences in all user-supplied parameters, particularly those used in file inclusion operations. Network-level protections including web application firewalls can provide additional defense-in-depth by blocking suspicious directory traversal patterns in HTTP requests. Security monitoring should focus on detecting unusual file access patterns and unauthorized file upload activities, while regular security audits should verify that no unauthorized modifications exist in the component directories. Organizations should also consider implementing principle of least privilege configurations for web application directories and regularly review file permissions to minimize the potential impact of successful exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and the dangers of relying on insecure file inclusion practices in web applications, making it a prime example of why security-by-design principles must be implemented throughout the software development lifecycle.