CVE-2023-48880 in EyouCMS
Summary
by MITRE • 11/29/2023
A stored cross-site scripting (XSS) vulnerability in EyouCMS v1.6.4-UTF8-SP1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Menu Name field at /login.php?m=admin&c=Index&a=changeTableVal&_ajax=1&lang=cn.
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Analysis
by VulDB Data Team • 03/02/2026
This vulnerability represents a critical stored cross-site scripting flaw in EyouCMS version 1.6.4-UTF8-SP1 that enables remote attackers to inject malicious scripts into the application's menu management interface. The vulnerability specifically affects the Menu Name field within the administrative panel at the endpoint /login.php?m=admin&c=Index&a=changeTableVal&_ajax=1&lang=cn, where user input is not properly sanitized or validated before being stored in the database and subsequently rendered in subsequent HTTP responses. The flaw occurs because the application fails to implement adequate input validation and output encoding mechanisms for administrative user inputs, creating a persistent vector for malicious code execution.
The technical implementation of this vulnerability stems from the application's inadequate sanitization of user-supplied data within the changeTableVal action of the Index controller. When administrators modify menu names through the administrative interface, the system stores the provided input directly into the database without proper filtering or encoding. This stored data is then retrieved and displayed in subsequent administrative pages without appropriate HTML escaping or context-aware encoding, creating an ideal environment for cross-site scripting attacks. The vulnerability is classified as a stored XSS (CWE-79) because the malicious payload is permanently stored within the application's database and executed whenever the affected page is accessed by any user with appropriate privileges.
The operational impact of this vulnerability is significant as it provides attackers with the ability to execute arbitrary JavaScript code within the context of any authenticated administrator's browser session. This could potentially lead to complete administrative compromise, allowing attackers to perform actions such as creating new administrator accounts, modifying website content, stealing session cookies, or accessing sensitive data. The attack vector is particularly concerning because it requires minimal user interaction beyond the initial exploitation, as the malicious script executes automatically when administrators view the affected menu items. This vulnerability directly aligns with attack techniques documented in the MITRE ATT&CK framework under the T1566.001 sub-technique for "Phishing: Spearphishing Attachment" and T1059.007 for "Command and Scripting Interpreter: JavaScript", as it leverages the web application's legitimate functionality to execute malicious code.
Mitigation strategies for this vulnerability should include immediate implementation of input validation and output encoding mechanisms throughout the application's administrative interfaces. The most effective immediate fix involves implementing proper HTML entity encoding for all user-supplied content before rendering it in web pages, combined with comprehensive input validation that rejects or sanitizes potentially malicious payloads. Organizations should also implement Content Security Policy headers to limit the execution of inline scripts and prevent unauthorized code execution. Additionally, regular security audits should be conducted to identify and remediate similar input validation flaws across all administrative interfaces. The vulnerability demonstrates the critical importance of defense-in-depth approaches and proper secure coding practices, particularly when handling user input in web applications that serve administrative functions, as highlighted in the OWASP Top Ten Proactive Controls and the NIST Cybersecurity Framework's Protect function.