CVE-2025-68533 in WC Builder Plugin
Summary
by MITRE • 12/24/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in HasThemes WC Builder wc-builder allows Stored XSS.This issue affects WC Builder: from n/a through <= 1.2.0.
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Analysis
by VulDB Data Team • 12/24/2025
The vulnerability identified as CVE-2025-68533 represents a critical cross-site scripting flaw within the HasThemes WC Builder plugin, specifically impacting versions through 1.2.0. This weakness resides in the improper neutralization of input during web page generation processes, creating a persistent stored XSS attack vector that can compromise user sessions and execute malicious scripts within the context of affected websites. The vulnerability falls under the CWE-79 category of Cross-site Scripting, which is classified as a fundamental web application security flaw that allows attackers to inject client-side scripts into web pages viewed by other users. The stored nature of this vulnerability means that malicious payloads are permanently saved on the server and executed whenever affected pages are loaded, making it particularly dangerous for content management systems where user-generated content is processed and displayed.
The technical implementation of this vulnerability occurs when the WC Builder plugin fails to properly sanitize or escape user input before rendering it within web pages. Attackers can exploit this weakness by submitting malicious script code through input fields or parameters that are subsequently stored in the plugin's database or configuration files. When other users access pages that display this stored content, their browsers execute the injected scripts, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability's impact is amplified by the fact that it affects the core web page generation functionality, meaning that any content processed by the plugin could serve as an attack vector. This flaw typically occurs when developers assume that user input will be benign and fail to implement proper input validation and output encoding mechanisms that are essential for preventing XSS attacks.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to gain unauthorized access to user accounts, manipulate website content, and potentially escalate privileges within the affected system. Users with administrative capabilities may be particularly at risk, as successful exploitation could allow attackers to modify plugin configurations, inject backdoors, or even compromise the entire WordPress installation. The stored nature of the XSS attack means that the malicious code persists even after the initial injection, making it difficult to detect and remove. This vulnerability aligns with ATT&CK technique T1566.001 which covers Spearphishing Attachments, and T1059.001 which involves Command and Scripting Interpreter, as attackers can leverage this flaw to establish persistent access and execute malicious commands through the compromised web application. Organizations using the affected plugin versions face significant risk of data breaches, reputational damage, and potential regulatory compliance violations due to the exposure of sensitive user information.
Mitigation strategies for this vulnerability should prioritize immediate patching of the WC Builder plugin to version 1.2.1 or later, which contains the necessary security fixes. Administrators should implement comprehensive input validation and output encoding mechanisms throughout the application, ensuring that all user-supplied data is properly sanitized before being stored or displayed. The implementation of Content Security Policy headers can provide additional protection against XSS attacks by restricting the sources from which scripts can be loaded. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other components of the web application stack. Organizations should also consider implementing Web Application Firewall rules that can detect and block suspicious input patterns associated with XSS attacks. According to OWASP Top Ten 2021, this vulnerability would be classified as a high-risk issue under the A03:2021 - Injection category, emphasizing the critical need for proper input validation and output encoding. The vulnerability demonstrates the importance of following secure coding practices and implementing defense-in-depth strategies that protect against multiple attack vectors simultaneously.