CVE-2026-66657 in Biagiotti Core Plugin
Summary
by MITRE • 08/13/2026
Unauthenticated Local File Inclusion in Biagiotti Core <= 2.1.1 versions.
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Analysis
by VulDB Data Team • 08/13/2026
The vulnerability identified as unauthenticated local file inclusion in Biagiotti Core versions up to and including 2.1.1 represents a critical security flaw that allows attackers to access arbitrary files on the server without requiring authentication credentials. This type of vulnerability falls under the Common Weakness Enumeration category CWE-22 known as "Improper Limitation of a Pathname to a Restricted Directory" and specifically manifests as CWE-98 which describes "Inclusion of File or Directory Path with Improper Validation." The flaw exists in the core framework's handling of file inclusion parameters, where user-supplied input is directly incorporated into file path construction without proper validation or sanitization measures.
The technical implementation of this vulnerability occurs when the application processes file inclusion requests through parameters that accept file paths or identifiers. Attackers can manipulate these parameters to traverse the file system and access sensitive files such as configuration files, database credentials, application source code, or system files. The vulnerability is particularly dangerous because it operates without requiring any authentication, making it accessible to anyone who can interact with the vulnerable application interface. This allows threat actors to perform reconnaissance activities and potentially escalate their access to compromise the entire server infrastructure.
The operational impact of this vulnerability extends beyond simple information disclosure as it creates a pathway for attackers to execute additional malicious activities within the compromised environment. Once an attacker gains access to sensitive files, they can extract database connection strings, API keys, or other credentials that may lead to further system compromise. The vulnerability also enables attackers to potentially upload malicious files or modify existing ones, creating persistent backdoors or launching more sophisticated attacks. According to the MITRE ATT&CK framework, this vulnerability maps to technique T1566.001 "Phishing for Information" and T1078.004 "Valid Accounts: Cloud Accounts" when combined with credential theft from compromised files.
Mitigation strategies for this vulnerability require immediate patching of the affected Biagiotti Core versions to address the underlying file inclusion flaw. Organizations should implement proper input validation and sanitization mechanisms that prevent path traversal sequences such as ../ or ..\ from being processed in file inclusion operations. The implementation of a whitelist-based approach for file access, where only predetermined safe files can be accessed, provides an effective defense mechanism against this class of vulnerability. Additionally, the principle of least privilege should be enforced by restricting file system permissions and ensuring that the web application runs with minimal required privileges. Network segmentation and web application firewalls can provide additional layers of protection by monitoring and blocking suspicious file access patterns. Regular security assessments and code reviews should include specific checks for improper file handling practices to prevent similar vulnerabilities from being introduced in future development cycles.