CVE-2018-18725 in YUNUCMS
Summary
by MITRE
An XSS issue was discovered in admin/banner/editbanner?id=20 in YUNUCMS 1.1.5.
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Analysis
by VulDB Data Team • 04/07/2020
The vulnerability identified as CVE-2018-18725 represents a cross-site scripting flaw within the YUNUCMS content management system version 1.1.5. This security weakness specifically manifests in the administrative banner editing functionality at the endpoint admin/banner/editbanner?id=20, where insufficient input validation and output sanitization mechanisms fail to properly handle malicious user-supplied data. The flaw allows attackers to inject malicious scripts that can execute within the context of other users' browsers, potentially leading to unauthorized actions or data theft.
The technical nature of this vulnerability aligns with CWE-79, which defines cross-site scripting as a code injection attack that occurs when an application includes untrusted data in web pages without proper validation or escaping. The issue stems from the application's failure to sanitize user input before rendering it in the administrative interface, creating an environment where malicious payloads can be stored and subsequently executed when legitimate users access the affected page. This particular attack vector targets the banner management module, suggesting that the vulnerability exists in how the system processes and displays banner-related data within the admin panel.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with potential access to administrative functions and sensitive information. An attacker who successfully exploits this XSS flaw could manipulate banner content to redirect users to malicious sites, steal session cookies, or perform unauthorized administrative actions. The vulnerability's location within the administrative interface makes it particularly dangerous as it could enable privilege escalation or complete system compromise if combined with other attack vectors. The specific endpoint admin/banner/editbanner?id=20 indicates that the issue affects the banner editing functionality where users can modify banner properties and content, creating multiple opportunities for malicious input injection.
Mitigation strategies for this vulnerability should include implementing proper input validation and output encoding mechanisms throughout the application's data processing pipeline. The recommended approach involves sanitizing all user-supplied data before storage and rendering, particularly within administrative interfaces where the risk of exploitation is highest. Security measures should include employing Content Security Policy headers to limit script execution, implementing proper escape sequences for dynamic content, and conducting thorough input validation to prevent malicious payloads from being stored. Organizations should also consider implementing web application firewalls to detect and block suspicious script injection attempts. The vulnerability demonstrates the importance of following secure coding practices as outlined in the OWASP Top Ten and aligns with ATT&CK technique T1059.001 for command and script injection, emphasizing the need for comprehensive input sanitization in web applications to prevent such persistent security flaws.