CVE-2022-4892 in MyCMS
Summary
by MITRE • 01/19/2023
A vulnerability was found in MyCMS. It has been classified as problematic. This affects the function build_view of the file lib/gener/view.php of the component Visitors Module. The manipulation of the argument original/converted leads to cross site scripting. It is possible to initiate the attack remotely. The name of the patch is d64fcba4882a50e21cdbec3eb4a080cb694d26ee. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-218895.
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Analysis
by VulDB Data Team • 02/15/2023
The vulnerability identified as CVE-2022-4892 represents a cross-site scripting flaw within the MyCMS content management system that specifically targets the Visitors Module component. This security weakness exists in the build_view function located within the lib/gener/view.php file, making it a critical concern for web application security. The vulnerability manifests when an attacker manipulates the original/converted argument parameters, creating an avenue for malicious script execution within the context of affected user sessions. This particular flaw falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application vulnerabilities according to the CWE database. The attack vector is remotely exploitable, meaning that malicious actors can initiate the vulnerability without requiring physical access to the target system or local network presence. This remote exploit capability significantly increases the potential impact and attack surface for the vulnerability.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output sanitization within the build_view function. When user-supplied data is processed through the original/converted argument handling, the application fails to properly escape or filter potentially malicious script content before rendering it in the web interface. This allows attackers to inject malicious JavaScript code that executes in the browser context of legitimate users who view the affected content. The vulnerability's classification as a remote attack vector indicates that exploitation can occur through standard web browser interactions, potentially through crafted URLs, form submissions, or even via social engineering techniques that encourage users to click malicious links. The patch referenced in the vulnerability disclosure, identified by the commit hash d64fcba4882a50e21cdbec3eb4a080cb694d26ee, provides the necessary code modifications to address this specific weakness by implementing proper input sanitization and output encoding mechanisms.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and redirection to malicious websites. When users with elevated privileges access compromised content, the potential for privilege escalation and broader system compromise increases significantly. The vulnerability's presence in the Visitors Module suggests that it could affect user interaction tracking, analytics, or visitor management features, potentially allowing attackers to monitor user behavior or manipulate visitor data. Organizations running MyCMS systems with this vulnerability face substantial risk of unauthorized access and data compromise, particularly if the application serves users with administrative or sensitive data access permissions. The vulnerability's classification as problematic by security researchers indicates that it represents a significant threat level that requires immediate attention and remediation.
Mitigation strategies for CVE-2022-4892 should prioritize the immediate application of the provided patch referenced in the commit hash d64fcba4882a50e21cdbec3eb4a080cb694d26ee. This patch addresses the root cause by implementing proper input validation and output encoding mechanisms within the build_view function to prevent malicious script injection. Additionally, organizations should implement comprehensive input sanitization measures across all user-facing application components, particularly those handling dynamic content generation. Web application firewalls should be configured to detect and block suspicious script patterns, while regular security assessments should be conducted to identify similar vulnerabilities in other application modules. The vulnerability's relationship to the ATT&CK framework's T1059.007 technique for Scripting demonstrates how this flaw can be leveraged to execute malicious code through web-based interfaces, emphasizing the need for robust application-level defenses. Security teams should also consider implementing Content Security Policy headers to add an additional layer of protection against XSS attacks, ensuring that even if a vulnerability is exploited, the impact is minimized through browser-level restrictions on script execution.