CVE-2019-8410 in MacCMS
Summary
by MITRE
Maccms 8.0 allows XSS via the inc/config/cache.php t_key parameter because template/paody/html/vod_type.html mishandles the keywords parameter, and a/tpl/module/db.php only filters the t_name parameter (not t_key).
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Analysis
by VulDB Data Team • 07/26/2023
The vulnerability identified as CVE-2019-8410 affects Maccms version 8.0 and represents a cross-site scripting flaw that stems from inadequate input validation and sanitization within the application's configuration and template handling mechanisms. This issue manifests when the application processes the t_key parameter through the inc/config/cache.php file, where the template/paody/html/vod_type.html file fails to properly handle the keywords parameter, creating an exploitable vector for malicious script injection.
The technical implementation of this vulnerability occurs due to the application's inconsistent filtering approach in the a/tpl/module/db.php file, which specifically filters the t_name parameter while completely neglecting the t_key parameter. This disparity in input validation creates a security gap where attackers can inject malicious JavaScript code through the t_key parameter, which then gets executed in the context of other users' browsers when the vulnerable template renders the content. The flaw demonstrates poor secure coding practices and highlights the importance of consistent input sanitization across all parameters regardless of their apparent risk level.
The operational impact of CVE-2019-8410 extends beyond simple script execution as it can enable attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and defacement of the affected website. When exploited, this vulnerability allows unauthorized users to inject persistent scripts that can compromise user sessions, steal sensitive information, or redirect users to malicious websites. The vulnerability affects the core content management functionality of Maccms, potentially compromising the entire application's integrity and user data protection mechanisms.
Security mitigations for this vulnerability should focus on implementing comprehensive input validation and sanitization across all parameters, particularly addressing the inconsistent filtering approach demonstrated in the affected files. Organizations should immediately apply patches or updates provided by the Maccms development team to address the specific parameter handling issues in both cache.php and db.php files. Additionally, implementing proper content security policies, input encoding, and output escaping mechanisms would prevent similar vulnerabilities from occurring in future deployments. This vulnerability aligns with CWE-79 - Cross-site Scripting and can be mapped to ATT&CK technique T1059.007 - Command and Scripting Interpreter: PowerShell, as it enables attackers to execute malicious scripts in user browsers through the exploitation of template rendering mechanisms.
The vulnerability represents a classic example of how incomplete input validation can create persistent security risks within web applications, emphasizing the need for thorough security testing and consistent implementation of security controls across all application components. Organizations should conduct comprehensive security assessments to identify similar parameter filtering inconsistencies and ensure all user-supplied inputs are properly validated and sanitized before processing or rendering. Regular security updates and code reviews focusing on input handling mechanisms are essential to prevent exploitation of similar vulnerabilities in other parts of the application stack.