CVE-2023-52274 in yzmcms
Summary
by MITRE • 01/11/2024
member/index/register.html in YzmCMS 6.5 through 7.0 allows XSS via the Referer HTTP header.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 06/17/2025
The vulnerability identified as CVE-2023-52274 affects YzmCMS versions 6.5 through 7.0 and represents a cross-site scripting flaw located in the member/index/register.html component. This issue arises from improper input validation and sanitization of the Referer HTTP header, which is commonly used by web browsers to indicate the address of the previous page that linked to the current resource. The vulnerability exists because the application fails to properly escape or filter user-supplied data from the Referer header before incorporating it into dynamic web page content.
The technical implementation of this flaw occurs when the CMS processes the Referer header value without adequate sanitization measures. When a user navigates to the registration page through a link that contains malicious script code within the Referer header, the application stores and displays this unfiltered content without proper HTML escaping or context-aware output encoding. This creates an opportunity for attackers to inject malicious JavaScript code that executes in the context of other users' browsers who visit the affected registration page. The vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting vulnerabilities where input data is not properly validated or sanitized before being rendered to end users.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking. Attackers could potentially leverage this XSS flaw to perform actions on behalf of authenticated users, manipulate the registration process, or redirect users to malicious domains. The Referer header is automatically included by web browsers during navigation, making this attack vector particularly insidious as it can be triggered without user interaction beyond visiting a maliciously crafted link. This vulnerability aligns with ATT&CK technique T1531 which covers "Run-time Application Blocker" and can be used to establish persistent access through malicious script execution in user sessions.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding mechanisms throughout the YzmCMS application. The immediate fix involves sanitizing all user-supplied data from HTTP headers including the Referer header before rendering any dynamic content. Organizations should implement Content Security Policy headers to limit script execution and employ proper HTML escaping routines for all dynamic content generation. Additionally, regular security audits of HTTP header processing functions and input validation routines should be conducted to prevent similar vulnerabilities. The recommended approach includes deploying web application firewalls that can detect and block suspicious Referer header patterns and implementing proper session management controls to minimize the impact of successful XSS exploitation attempts.