CVE-2024-29926 in WC Builder Plugin
Summary
by MITRE • 03/27/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in HasThemes WC Builder allows Stored XSS.This issue affects WC Builder: from n/a through 1.0.18.
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Analysis
by VulDB Data Team • 01/28/2026
The vulnerability identified as CVE-2024-29926 represents a critical cross-site scripting flaw within the HasThemes WC Builder plugin, specifically impacting versions ranging from an unspecified initial version through 1.0.18. This weakness falls under the well-established category of improper input neutralization during web page generation, creating a persistent security risk that enables attackers to execute malicious scripts in the context of affected user sessions. The vulnerability manifests as a stored XSS attack vector, meaning that malicious code injected into the application's input fields gets permanently stored and subsequently executed whenever legitimate users access the affected pages. This classification aligns with CWE-79, which defines cross-site scripting as a code injection attack that occurs when an application includes untrusted data in a web page without proper validation or escaping mechanisms.
The technical exploitation of this vulnerability occurs when malicious actors input crafted script payloads into fields that are subsequently rendered in web pages without adequate sanitization or output encoding. In the context of WC Builder, this typically involves form inputs, content fields, or parameter handling where user-supplied data flows directly into HTML output generation without proper security measures. The stored nature of this vulnerability means that once malicious code is injected and saved within the application's database, it persists and automatically executes whenever authorized users view the affected content, creating a continuous threat vector. Attackers can leverage this weakness to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious sites, or even escalate privileges within the affected system.
The operational impact of CVE-2024-29926 extends beyond simple data theft, as it provides attackers with persistent access to compromised systems through the web application layer. When legitimate users interact with the affected plugin, their browsers execute the stored malicious scripts, potentially leading to full account compromise, data exfiltration, or establishment of backdoors. The vulnerability affects the core functionality of WC Builder, which is designed for building and customizing WordPress websites, making it particularly dangerous for e-commerce environments where user sessions contain sensitive transactional data. The attack surface is significantly broadened because the vulnerability affects all versions up to and including 1.0.18, indicating a prolonged period during which the flaw remained unaddressed. Security researchers have classified this as a high-severity issue under the ATT&CK framework's initial access and persistence tactics, as it enables attackers to establish footholds within web applications that can be leveraged for further compromise.
Mitigation strategies for CVE-2024-29926 require immediate action from affected organizations, beginning with the urgent application of available patches or updates from HasThemes. System administrators should implement comprehensive input validation and output encoding mechanisms across all user-facing fields within the WC Builder plugin, ensuring that all user-supplied data undergoes proper sanitization before being rendered in web pages. The implementation of Content Security Policy headers can provide an additional layer of protection by restricting the sources from which scripts can be executed, while also preventing the execution of unauthorized code. Organizations should also consider implementing web application firewalls to monitor and block suspicious input patterns that may indicate attempted XSS attacks. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities within other plugins and themes. The remediation process should include thorough testing of patched versions to ensure that the fix does not introduce regressions in functionality while maintaining the integrity of legitimate user inputs. Additionally, user education regarding the risks of visiting untrusted websites and the importance of keeping software updated should be emphasized as part of a comprehensive security posture.