CVE-2006-5253 in phpOnline
Summary
by MITRE
PHP remote file inclusion vulnerability in strload.php in Dayana Networks phpOnline (aka PHP-Online) 2.1 allows remote attackers to execute arbitrary PHP code via a URL in the LangFile parameter.
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Analysis
by VulDB Data Team • 04/24/2026
The vulnerability identified as CVE-2006-5253 represents a critical remote file inclusion flaw within the Dayana Networks phpOnline 2.1 web application. This issue specifically affects the strload.php script which processes user-supplied input through the LangFile parameter without adequate validation or sanitization. The vulnerability falls under the category of CWE-88, which describes improper neutralization of special elements used in an expression, and more specifically aligns with CWE-94, which encompasses execution of arbitrary code due to improper input validation. The flaw enables attackers to inject malicious URLs that are subsequently included and executed by the vulnerable application, creating a pathway for remote code execution.
The technical exploitation of this vulnerability occurs when an attacker provides a malicious URL as the value for the LangFile parameter in the strload.php script. When the application processes this input, it performs a remote file inclusion operation that loads and executes the contents of the specified URL. This behavior stems from the application's failure to validate or sanitize user input before using it in file inclusion operations. The vulnerability is particularly dangerous because it allows attackers to execute arbitrary PHP code on the target server, potentially leading to complete system compromise. The ATT&CK framework categorizes this as a code injection technique under T1059, specifically targeting remote code execution through web application vulnerabilities.
The operational impact of this vulnerability extends far beyond simple data theft or disruption. An attacker who successfully exploits this vulnerability can gain full control over the affected web server, potentially using it as a launch point for further attacks within the network infrastructure. The compromised server may be used to host malicious content, serve as a command and control center for botnet operations, or provide a persistent backdoor for future access. Organizations running vulnerable versions of phpOnline face significant risks including data breaches, service disruption, and potential regulatory violations depending on the nature of the data processed by the affected applications. The vulnerability is particularly concerning because it requires minimal technical expertise to exploit and can be automated through various attack vectors.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected software to the latest secure version provided by Dayana Networks. Organizations should implement input validation controls that sanitize all user-supplied data before processing, particularly parameters used in file inclusion operations. The principle of least privilege should be enforced by configuring web applications to use minimal permissions and avoid executing code from remote sources. Network segmentation and monitoring solutions should be deployed to detect anomalous file inclusion patterns and unauthorized code execution attempts. Additionally, organizations should consider implementing web application firewalls that can detect and block malicious payloads targeting known remote file inclusion vulnerabilities. The vulnerability serves as a reminder of the importance of secure coding practices and proper input validation, as outlined in OWASP Top Ten security principles and the defense-in-depth approach recommended by NIST cybersecurity frameworks.