A high-severity vulnerability has been identified in multiple CocoBasic Neresa products, which could allow an attacker to read sensitive files on the server. This flaw, known as Local File Inclusion, can be exploited remotely without authentication, potentially leading to the exposure of confidential data, system credentials, and application source code, ultimately risking a full system compromise. Organizations are urged to apply the vendor-provided security updates immediately to mitigate this significant risk.

The vulnerability is an Improper Control of a Filename used in a PHP include or require statement. An attacker can manipulate an input parameter, likely in the URL, to control which file is loaded by the application on the server. By using directory traversal techniques (e.g., ../../), the attacker can force the application to include and potentially execute or display the contents of arbitrary files from the local filesystem. This could allow an attacker to read sensitive configuration files containing database credentials, system user files like /etc/passwd, or even execute arbitrary code if they can first upload a malicious file to the server.

This vulnerability presents a high risk to the organization, reflected by its CVSS score of 8.1. Successful exploitation could lead to a significant data breach, exposing sensitive customer information, intellectual property, or internal credentials stored on the server. The disclosure of configuration files could provide an attacker with the necessary information to pivot and compromise other systems, such as databases. This could result in severe reputational damage, regulatory fines, and financial loss associated with incident response and recovery.

Immediate Action: The primary remediation is to apply the security updates provided by CocoBasic Neresa across all affected products without delay. Prioritize patching for internet-facing systems. After patching, it is crucial to review web server access and error logs for any signs of past or ongoing exploitation attempts.

Proactive Monitoring: Security teams should actively monitor web server logs for suspicious requests containing directory traversal patterns (e.g., ../, ..%2f) or attempts to access common sensitive files (e.g., wp-config.php, .env, /etc/passwd). Monitor for unusual outbound traffic from web servers, which could indicate a successful compromise and data exfiltration. Implement alerts for repeated HTTP 404 or 500 errors associated with file-loading parameters, as these can indicate failed exploitation attempts.

Compensating Controls: If immediate patching is not feasible, implement a Web Application Firewall (WAF) with rules specifically designed to detect and block Local File Inclusion and directory traversal attack patterns. Additionally, ensure the web server process is running with the lowest possible privileges and is restricted from accessing unnecessary files and directories on the server's filesystem.

Public Exploit Available: false

Given the high severity (CVSS 8.1) and the potential for remote exploitation, this vulnerability requires immediate attention. We strongly recommend that organizations identify all affected CocoBasic Neresa products within their environment and apply the vendor-supplied patches on an emergency basis, prioritizing critical and internet-exposed assets. Although there is no evidence of active exploitation at this time, the risk of it occurring is high. If patching is delayed, the implementation of a WAF and enhanced monitoring should be treated as a critical, albeit temporary, risk mitigation measure.