CVE-2006-5845 in Speedywiki
Summary
by MITRE
Unrestricted file upload vulnerability in index.php in Speedywiki 2.0 allows remote authenticated users to upload and execute arbitrary PHP code by setting the upload parameter to 1.
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Analysis
by VulDB Data Team • 04/27/2026
The CVE-2006-5845 vulnerability represents a critical security flaw in Speedywiki 2.0's index.php script that enables authenticated attackers to bypass file upload restrictions and execute malicious code remotely. This vulnerability falls under the category of unrestricted file upload flaws, which are classified as CWE-434 within the Common Weakness Enumeration framework. The flaw specifically resides in how the application handles file upload parameters, allowing attackers who have already gained authentication credentials to manipulate the upload process through the upload parameter.
The technical exploitation of this vulnerability occurs when an authenticated user modifies the upload parameter value to 1, which triggers the application's file upload functionality without proper validation or sanitization. This parameter manipulation enables attackers to bypass the intended file type restrictions and upload malicious PHP files containing executable code. The vulnerability essentially removes all barriers to uploading arbitrary files, making it possible for attackers to deploy web shells, backdoors, or other malicious payloads that can be executed within the web server context.
From an operational impact perspective, this vulnerability creates a severe risk for organizations using Speedywiki 2.0 as it transforms a legitimate authentication mechanism into a potential attack vector for code execution. Attackers can leverage this flaw to gain persistent access to the web server, escalate privileges, and potentially move laterally within the network. The vulnerability is particularly dangerous because it requires only authenticated access, which is often easier to obtain through credential theft, social engineering, or other initial compromise techniques. This type of vulnerability directly maps to ATT&CK technique T1505.003 for Server Software Component and T1078 for Valid Accounts, as it exploits legitimate user credentials to achieve unauthorized code execution.
The mitigation strategies for CVE-2006-5845 involve implementing robust input validation and sanitization measures that prevent parameter manipulation attacks. Organizations should enforce strict file type validation, implement proper content inspection for uploaded files, and ensure that uploaded files are stored outside the web root directory to prevent direct execution. Additionally, the application should implement proper access controls and validate all user inputs through proper sanitization techniques. Security patches or upgrades to newer versions of Speedywiki that address this specific vulnerability should be implemented immediately, as this is a known issue from 2006 that should have been resolved in modern versions of the software. The vulnerability also highlights the importance of secure coding practices, particularly in handling user-supplied data and parameter manipulation, which aligns with the principles of secure software development lifecycle and OWASP Top Ten security requirements.