CVE-2023-46935 in EyouCMS
Summary
by MITRE • 11/21/2023
eyoucms v1.6.4 is vulnerable Cross Site Scripting (XSS), which can lead to stealing sensitive information of logged-in users.
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Analysis
by VulDB Data Team • 02/18/2026
The eyoucms v1.6.4 content management system contains a critical cross site scripting vulnerability that poses significant security risks to authenticated users. This vulnerability falls under the CWE-79 category of Cross Site Scripting, representing one of the most prevalent and dangerous web application security flaws. The vulnerability specifically affects the application's handling of user input within the search functionality, where improperly sanitized parameters are directly reflected back to users without adequate output encoding or validation. Attackers can exploit this weakness by crafting malicious payloads that contain script code within the search query parameters, which then gets executed in the context of other users' browsers when they view the search results page.
The operational impact of this vulnerability extends beyond simple data theft, as it can enable attackers to establish persistent access to user sessions and potentially escalate privileges within the application. When logged-in users encounter the malicious search results containing embedded scripts, their browsers execute the malicious code, allowing attackers to steal session cookies, authentication tokens, or other sensitive user information. This type of attack aligns with the ATT&CK technique T1531 for Credential Access and T1059 for Command and Scripting Interpreter, as it leverages user browser contexts to execute malicious payloads. The vulnerability demonstrates poor input validation and output encoding practices that violate fundamental web security principles, particularly those outlined in the OWASP Top Ten Project's A03:2021 - Injection category.
Mitigation strategies for this vulnerability require immediate implementation of proper input sanitization and output encoding mechanisms throughout the application's search functionality. Developers must ensure that all user-supplied input is validated against a strict whitelist of acceptable characters and that any reflected output is properly encoded using context-appropriate encoding schemes such as HTML entity encoding for web page contexts. The fix should implement proper Content Security Policy headers to prevent unauthorized script execution and establish a robust input validation framework that rejects potentially malicious payloads before they can be processed. Additionally, regular security code reviews and automated vulnerability scanning should be implemented to identify similar weaknesses in other application components. The vulnerability serves as a reminder of the critical importance of adhering to secure coding practices and maintaining up-to-date security measures as outlined in NIST SP 800-160 and ISO/IEC 27001 standards for information security management.