CVE-2018-16233 in miniCMS
Summary
by MITRE
MiniCMS V1.10 has XSS via the mc-admin/post-edit.php tags parameter.
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Analysis
by VulDB Data Team • 05/06/2023
The vulnerability identified as CVE-2018-16233 affects MiniCMS version 1.10 and represents a cross-site scripting flaw that resides within the administrative post editing functionality. This issue specifically manifests through the mc-admin/post-edit.php script where the tags parameter fails to properly sanitize user input, creating an avenue for malicious actors to inject arbitrary JavaScript code into the application's web interface. The vulnerability falls under the category of persistent XSS attacks, as the malicious scripts can be stored within the application's database and executed whenever authenticated users access the affected administrative pages.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious payload containing JavaScript code and submits it through the tags parameter during post editing operations. When the vulnerable application processes this input without adequate sanitization or encoding, the malicious script gets stored and subsequently executed within the browser context of any user who views the affected content. This type of vulnerability is particularly dangerous in administrative contexts where privileged users may interact with the compromised content, potentially leading to full system compromise. The flaw aligns with CWE-79 which specifically addresses cross-site scripting vulnerabilities, and demonstrates how insufficient input validation and output encoding can create persistent security weaknesses in web applications.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the capability to hijack user sessions, steal sensitive credentials, and potentially escalate privileges within the MiniCMS environment. Administrative users who regularly edit posts and manage content become prime targets for exploitation, as their sessions could be compromised through session hijacking techniques. The vulnerability also enables attackers to manipulate the content management system's behavior, potentially allowing them to modify or delete posts, alter user permissions, or even inject malicious code into other parts of the application. This represents a significant threat to the integrity and confidentiality of the content management system's data and user information.
Mitigation strategies for CVE-2018-16233 should focus on implementing robust input validation and output encoding mechanisms throughout the application's data processing pipeline. The most effective immediate fix involves sanitizing all user inputs, particularly those submitted through the tags parameter, by employing proper HTML escaping techniques before storing or rendering the data. Organizations should also implement Content Security Policy headers to limit the execution of unauthorized scripts and consider implementing input length limits and character set restrictions for tag fields. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other parameters and scripts within the application. Additionally, implementing proper access controls and monitoring mechanisms can help detect and respond to potential exploitation attempts. This vulnerability demonstrates the critical importance of following secure coding practices and adheres to ATT&CK technique T1213 which covers data from information repositories, highlighting how XSS vulnerabilities can be leveraged to extract and manipulate sensitive information within web applications.