CVE-2018-18545 in Fiyo
Summary
by MITRE
Fiyo CMS 2.0.7 has XSS via the dapur\apps\app_user\edit_user.php name parameter.
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Analysis
by VulDB Data Team • 05/30/2023
Fiyo CMS version 2.0.7 contains a cross-site scripting vulnerability in the administrative user management component that allows remote attackers to inject malicious scripts into the application. The vulnerability specifically exists in the dapur/pps/pp_user/edit_user.php script where the name parameter is not properly sanitized or validated before being rendered in the web interface. This flaw enables attackers to execute arbitrary JavaScript code in the context of a victim's browser when they view the affected page, potentially leading to session hijacking, credential theft, or further exploitation of the compromised system.
The technical nature of this vulnerability aligns with CWE-79 which describes improper neutralization of input during web page generation, commonly known as cross-site scripting. The flaw represents a classic reflected XSS attack vector where user-supplied input flows directly into the application's output without adequate sanitization or encoding. Attackers can craft malicious URLs containing script payloads in the name parameter that, when accessed by administrators or other users with appropriate privileges, will execute in their browser context. This vulnerability falls under the ATT&CK technique T1213.002 for credential access through web application vulnerabilities.
The operational impact of this vulnerability is significant as it could allow an attacker to escalate privileges within the CMS environment. Since the affected endpoint is part of the user management system, successful exploitation could enable attackers to modify user accounts, create new administrator accounts, or gain unauthorized access to sensitive administrative functions. The vulnerability affects the integrity and confidentiality of user data within the CMS, potentially compromising the entire application if attackers can leverage it to establish persistent access or move laterally within the network. Organizations using this version of Fiyo CMS are particularly at risk as the vulnerability exists in the core administrative functionality that handles user account modifications.
Mitigation strategies should include immediate implementation of input validation and output encoding for all user-supplied parameters in the affected script. The application should sanitize all input data before rendering it in HTML contexts and implement proper Content Security Policy headers to prevent script execution. Organizations should upgrade to a patched version of Fiyo CMS as soon as possible, as the vulnerability appears to be a straightforward input sanitization issue that can be resolved through proper parameter validation. Additionally, implementing web application firewalls and monitoring for suspicious parameter values in the affected endpoint can provide additional defense in depth. Regular security auditing of web applications should include testing for XSS vulnerabilities in all user input fields, particularly in administrative interfaces where the potential impact of exploitation is highest.