CVE-2026-66653 in Barista Plugin
Summary
by MITRE • 08/13/2026
Unauthenticated Local File Inclusion in Barista <= 2.5.1 versions.
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Analysis
by VulDB Data Team • 08/13/2026
This vulnerability represents a critical security flaw in the Barista web application framework that affects versions up to and including 251. The issue manifests as an unauthenticated local file inclusion vulnerability that allows attackers to access arbitrary files on the server through crafted requests. The vulnerability stems from insufficient input validation and sanitization within the application's file handling mechanisms, enabling malicious actors to manipulate file paths and retrieve sensitive information from the underlying system.
The technical implementation of this flaw occurs when the application processes user-supplied parameters without proper validation, allowing directory traversal sequences such as ../ or ..\ to be appended to file paths. This weakness directly maps to CWE-22, which defines improper limitation of a pathname to a restricted directory, commonly known as path traversal attacks. Attackers can exploit this vulnerability to access configuration files, source code, database credentials, and other sensitive data stored on the server filesystem. The impact is particularly severe because no authentication is required to exploit this flaw, making it accessible to any external party with network connectivity to the vulnerable system.
From an operational perspective, this vulnerability creates significant risk for organizations using affected Barista versions as it provides unauthorized access to potentially critical system information. The attack surface extends beyond simple file reading to include potential privilege escalation opportunities, especially when combined with other vulnerabilities present in the application stack. Security frameworks such as MITRE ATT&CK categorize this type of vulnerability under T1059.007 for execution through scripts and T1566 for initial access through unauthenticated means. The lack of authentication requirements makes this vulnerability particularly dangerous as it can be exploited by automated scanning tools and attackers without requiring any valid credentials.
Organizations should immediately implement mitigations including updating to Barista versions 252 or later where this vulnerability has been patched, implementing proper input validation for all file handling operations, and configuring web application firewalls to detect and block suspicious path traversal attempts. Additional protective measures include restricting file access permissions, implementing proper logging and monitoring of file system operations, and conducting comprehensive security assessments to identify any other potential path traversal vulnerabilities within the application ecosystem. The vulnerability highlights the importance of input validation and proper security coding practices in preventing unauthorized access to sensitive system resources.