CVE-2019-10107 in CMS Made Simple
Summary
by MITRE
CMS Made Simple 2.2.10 has XSS via the myaccount.php "Email Address" field, which is reachable via the "My Preferences -> My Account" section.
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Analysis
by VulDB Data Team • 08/08/2023
The vulnerability identified as CVE-2019-10107 represents a cross-site scripting flaw within CMS Made Simple version 2.2.10 that specifically targets the email address field in the user account management interface. This issue resides in the myaccount.php component and can be exploited through the "My Preferences -> My Account" navigation path, making it accessible to authenticated users who possess valid credentials. The vulnerability stems from inadequate input validation and output sanitization mechanisms that fail to properly escape or filter user-supplied data before rendering it within the web application's response.
The technical exploitation of this vulnerability occurs when an attacker submits malicious script code through the email address field within the account settings. When the application displays this data without proper sanitization, the injected scripts execute within the context of other users' browsers who view the affected page. This creates a persistent XSS vector that can be leveraged to steal session cookies, perform unauthorized actions on behalf of victims, or redirect users to malicious websites. The vulnerability falls under CWE-79 which categorizes improper neutralization of input during web page generation, specifically addressing the failure to sanitize user-controllable data before incorporating it into dynamically generated web content.
From an operational perspective, this vulnerability presents significant risk to organizations using CMS Made Simple 2.2.10 as it allows attackers to compromise user sessions and potentially escalate privileges within the application. The attack surface is broad since the affected field is part of standard user account management functionality, meaning any authenticated user could potentially exploit this flaw. The impact extends beyond simple data theft as attackers could modify user preferences, access sensitive information, or manipulate the application's behavior through script injection. This vulnerability aligns with ATT&CK technique T1531 which involves use of web shell or malicious scripts to maintain persistent access to compromised systems.
Organizations should implement immediate mitigations including applying the official security patch released by CMS Made Simple for version 2.2.10, which addresses the input validation issues in the email field processing. Additionally, administrators should consider implementing Content Security Policy headers to limit script execution, conducting thorough input validation on all user-supplied data, and monitoring user account modifications for suspicious activity. Regular security audits should verify that all input fields are properly sanitized, and user sessions should be monitored for unauthorized access attempts. The vulnerability demonstrates the critical importance of validating and sanitizing all user inputs, particularly in web applications where user-controllable data is rendered within web pages, as highlighted in OWASP Top 10 2017 category A03: Injection and the broader context of secure coding practices.