Overview
CVE-2025-55409 is a significant security vulnerability identified in FoxCMS version 1.2.6. This vulnerability allows attackers to execute arbitrary code via a Cross-Site Scripting (XSS) attack, leading to potential system compromise or data leakage. As FoxCMS is widely used as a content management system, this vulnerability poses severe risk to numerous websites, potentially affecting their data integrity, system control, and overall online security.
Vulnerability Summary
CVE ID: CVE-2025-55409
Severity: High – 8.8 (CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: This vulnerability allows attackers to execute arbitrary code leading to potential system compromise or data leakage.
Affected Products
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Product | Affected Versions
FoxCMS | 1.2.6
How the Exploit Works
The exploit works by injecting malicious code in the /index.php/article path of the FoxCMS system. The flaw exists due to insufficient sanitization of user inputs in the said path. When a user visits a manipulated page, the unfiltered input launches a Cross-Site Scripting attack, enabling the attacker to execute arbitrary code in the victim’s browser. This can lead to session hijacking, identity theft, defacement of the affected site, or even the redirection of the user to malicious web locations.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited. This is a sample HTTP request with a malicious payload:
GET /index.php/article?input=<script>malicious_code_here</script> HTTP/1.1
Host: vulnerable-website.comIn this example, ‘malicious_code_here’ represents the attacker’s arbitrary code that will be executed in the user’s browser.
Mitigation and Prevention
To mitigate this vulnerability, users of FoxCMS 1.2.6 should apply the patch provided by the vendor as soon as possible. Until the patch can be applied, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation. These tools can help detect and prevent malicious XSS payloads from being executed.
To prevent such vulnerabilities in the future, developers should adopt secure coding practices such as input validation, output encoding, and use of security headers to mitigate XSS attacks. Additionally, conducting regular security audits and vulnerability assessments can help identify and fix vulnerabilities before they can be exploited.