CVE-2018-17413 in zzcms
Summary
by MITRE
XSS exists in zzcms v8.3 via the /uploadimg_form.php noshuiyin parameter.
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Analysis
by VulDB Data Team • 07/29/2023
The vulnerability CVE-2018-17413 represents a cross-site scripting flaw discovered in zzcms version 8.3, specifically within the uploadimg_form.php script where the noshuiyin parameter is susceptible to malicious input injection. This issue falls under the category of client-side vulnerabilities that can be exploited to execute arbitrary JavaScript code within the context of a victim's browser session. The flaw exists in the web application's input validation mechanisms, where user-supplied data from the noshuiyin parameter is not properly sanitized before being rendered back to the user interface. This allows attackers to inject malicious scripts that can persist in the application's response and execute when other users view the affected content.
The technical implementation of this vulnerability stems from the application's failure to implement proper output encoding or sanitization of user-provided parameters. When the noshuiyin parameter is processed and displayed without adequate filtering, it creates an opportunity for attackers to embed malicious JavaScript payloads that can be executed in the browser context of authenticated users. The vulnerability is classified as a reflected cross-site scripting issue according to CWE-79, which specifically addresses the improper handling of untrusted data in web applications. This weakness allows attackers to inject scripts that can steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users without their knowledge.
The operational impact of this vulnerability is significant as it can lead to unauthorized access to user sessions, data theft, and potential privilege escalation within the application. An attacker could craft malicious URLs containing script payloads that, when accessed by administrators or other users with elevated privileges, could result in complete compromise of the affected system. The vulnerability can be exploited through various vectors including email phishing campaigns, compromised web pages, or direct injection into the application's upload functionality. According to ATT&CK framework, this vulnerability maps to T1059.007 for scripting and T1566.001 for spearphishing attachments, demonstrating how such flaws can serve as initial access vectors for more sophisticated attacks. The impact extends beyond simple data theft as it can enable attackers to manipulate the application's behavior and potentially gain persistent access to the system.
Mitigation strategies for CVE-2018-17413 should focus on implementing comprehensive input validation and output encoding mechanisms within the zzcms application. The most effective remediation involves sanitizing all user-provided input through proper encoding techniques such as HTML entity encoding before rendering content back to users. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against script execution. The development team should also enforce strict parameter validation for the noshuiyin parameter, ensuring that only expected data types and formats are accepted. Regular security code reviews and automated vulnerability scanning should be implemented to identify similar issues in other application components. Organizations should also consider implementing web application firewalls to detect and block malicious payloads attempting to exploit this vulnerability. The patching process requires immediate attention as this vulnerability can be exploited by attackers with minimal technical expertise and can result in complete system compromise if left unaddressed.