CVE-2010-1540 in Com Myblog
Summary
by MITRE
Directory traversal vulnerability in index.php in the MyBlog (com_myblog) component 3.0.329 for Joomla! allows remote attackers to read arbitrary files via a .. (dot dot) in the task parameter. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 07/23/2025
The CVE-2010-1540 vulnerability represents a critical directory traversal flaw within the MyBlog component version 3.0.329 for Joomla! platforms. This vulnerability specifically affects the index.php script and exploits a weakness in how the application processes the task parameter, allowing malicious actors to manipulate file access paths through the use of directory traversal sequences. The flaw enables remote attackers to access arbitrary files on the server by leveraging the .. (dot dot) sequence in the task parameter, effectively bypassing normal file access controls and potentially exposing sensitive system information.
This vulnerability falls under the CWE-22 category, which classifies directory traversal attacks as a fundamental security weakness in input validation and file handling mechanisms. The attack vector operates through the manipulation of the task parameter in the MyBlog component, where the application fails to properly sanitize user input before processing file operations. When the application receives a request containing directory traversal sequences, it processes these sequences without adequate validation, allowing the attacker to navigate beyond the intended directory structure and access files that should remain protected. The vulnerability exists due to insufficient input sanitization and improper validation of file paths, creating an opportunity for unauthorized file access that can compromise system integrity and confidentiality.
The operational impact of this vulnerability extends beyond simple file disclosure, as it can potentially lead to complete system compromise when combined with other exploitation techniques. Attackers can leverage this vulnerability to access configuration files, database credentials, user information, and potentially execute arbitrary code if the application has write permissions to critical directories. The remote nature of the attack means that exploitation can occur from any location without requiring local system access, making it particularly dangerous for web applications hosting sensitive data. The vulnerability affects all Joomla! installations using the specific MyBlog component version, creating widespread exposure across numerous web platforms that may not have been properly updated or patched.
Mitigation strategies for CVE-2010-1540 should focus on immediate patching of the affected MyBlog component to version 3.0.330 or later, which includes proper input validation and sanitization mechanisms. Organizations should implement comprehensive input validation at multiple layers, including application-level filtering of directory traversal sequences and proper access control enforcement. Network-level protections such as web application firewalls can provide additional defense-in-depth measures by monitoring and blocking suspicious directory traversal attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date software components and implementing robust security practices including regular vulnerability assessments, proper input validation, and access control mechanisms. Security teams should also consider implementing monitoring solutions that can detect anomalous file access patterns and potential exploitation attempts. The ATT&CK framework categorizes this vulnerability under the T1083 technique for discovering file and directory permissions, while also potentially enabling T1078 for legitimate credential access and T1566 for initial access through web application vulnerabilities. Organizations should prioritize patch management processes and maintain current threat intelligence to prevent exploitation of similar directory traversal vulnerabilities in other components and frameworks.