CVE-2017-13778 in Fiyo
Summary
by MITRE
Fiyo CMS 2.0.7 has XSS in dapur\apps\app_config\sys_config.php via the site_name parameter.
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Analysis
by VulDB Data Team • 11/12/2019
The vulnerability CVE-2017-13778 represents a cross-site scripting flaw discovered in Fiyo CMS version 2.0.7 within the administrative interface. This issue specifically affects the system configuration module where the site_name parameter is improperly sanitized, creating an avenue for malicious actors to inject arbitrary JavaScript code into the application's administrative panel. The vulnerability resides in the dapur/pps/pp_config/sys_config.php file, which processes user input without adequate validation or output encoding mechanisms. This allows attackers to execute malicious scripts in the context of authenticated admin sessions, potentially leading to complete system compromise through session hijacking or privilege escalation.
The technical exploitation of this vulnerability follows the CWE-79 pattern of cross-site scripting, where untrusted data flows from the application's input handling to its output rendering without proper sanitization. The site_name parameter serves as the attack vector, enabling attackers to inject malicious payloads that persist in the configuration settings. When administrators access the system configuration interface, their browsers execute the injected JavaScript code, creating a persistent XSS vulnerability that can be leveraged for various malicious purposes. The vulnerability demonstrates poor input validation practices and inadequate output encoding, which are fundamental security misconfigurations in web application development.
The operational impact of this vulnerability is significant as it provides attackers with a foothold within the administrative environment of the CMS. Successful exploitation could enable attackers to modify system configurations, create new administrative accounts, access sensitive data, or even deploy malware through the compromised administrative interface. The vulnerability affects the integrity and confidentiality of the entire CMS installation, as the administrative panel typically contains sensitive configuration data and system controls. Additionally, the persistent nature of the XSS allows attackers to maintain access over extended periods, potentially leading to data breaches or system downtime. This vulnerability directly aligns with ATT&CK technique T1059.007 for command and scripting interpreter, enabling attackers to execute arbitrary code in the context of the web application.
Mitigation strategies for CVE-2017-13778 should focus on immediate patching of the affected Fiyo CMS version to the latest available release that addresses the XSS vulnerability. Organizations should implement proper input validation and output encoding mechanisms for all user-supplied data, particularly in administrative interfaces where sensitive operations occur. The implementation of Content Security Policy headers can provide additional defense-in-depth measures against XSS attacks by restricting script execution. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other parts of the application. Additionally, administrators should be trained to recognize potential XSS attack vectors and ensure that all web applications maintain proper input sanitization and output encoding practices. The vulnerability underscores the importance of following secure coding practices and adhering to OWASP Top Ten security guidelines for preventing cross-site scripting attacks in web applications.