CVE-2018-18722 in YUNUCMS
Summary
by MITRE
An XSS issue was discovered in admin/content/editcontent?id=29&gopage=1 in YUNUCMS 1.1.5.
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Analysis
by VulDB Data Team • 04/07/2020
The vulnerability identified as CVE-2018-18722 represents a cross-site scripting flaw within the YUNUCMS content management system version 1.1.5. This issue manifests specifically within the administrative interface at the endpoint admin/content/editcontent?id=29&gopage=1, where user input is not properly sanitized or validated before being rendered back to the browser. The flaw exists in the web application's handling of parameters passed through the URL query string, creating an avenue for malicious actors to inject malicious scripts into the application's response.
The technical nature of this vulnerability aligns with CWE-79, which describes Cross-Site Scripting vulnerabilities where input data is not properly escaped or validated before being included in web pages served to users. The flaw occurs because the application fails to implement proper input sanitization mechanisms when processing the id and gopage parameters, allowing an attacker to inject malicious JavaScript code that executes in the context of other users' browsers. This particular endpoint appears to be part of the content editing functionality within the CMS's administrative panel, making it a critical attack surface for unauthorized users who have access to the admin interface or can manipulate parameters to reach this vulnerable code path.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a range of malicious activities including session hijacking, credential theft, data exfiltration, and privilege escalation within the CMS environment. An attacker who successfully exploits this vulnerability could potentially gain unauthorized access to administrative functions, modify content, or even escalate privileges to full system compromise depending on the underlying architecture and user permissions. The vulnerability is particularly concerning because it affects the administrative interface, which typically contains sensitive data and system controls that should be protected from unauthorized access.
Mitigation strategies for this vulnerability should include immediate implementation of proper input validation and output encoding mechanisms throughout the application's codebase, particularly in the administrative endpoints. The solution requires implementing strict parameter validation for all input data, including URL parameters, and ensuring that all user-supplied content is properly escaped before being rendered in HTML contexts. Organizations should also consider implementing Content Security Policy headers to limit script execution capabilities and apply the principle of least privilege to administrative accounts. The remediation process should involve thorough code review of all administrative endpoints and implementation of secure coding practices aligned with OWASP Top Ten recommendations and NIST cybersecurity guidelines to prevent similar vulnerabilities from occurring in future versions of the application.