CVE-2024-37948 in Caxton Plugin
Summary
by MITRE • 07/20/2024
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in PootlePress Caxton – Create Pro page layouts in Gutenberg allows Stored XSS.This issue affects Caxton – Create Pro page layouts in Gutenberg: from n/a through 1.30.1.
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Analysis
by VulDB Data Team • 03/17/2025
The vulnerability CVE-2024-37948 represents a critical security flaw in the PootlePress Caxton plugin for WordPress, specifically within the "Create Pro page layouts in Gutenberg" component. This issue manifests as an improper neutralization of input during web page generation, creating a persistent cross-site scripting vulnerability that allows attackers to execute malicious scripts in the context of affected websites. The vulnerability exists in versions ranging from the initial release through 1.30.1, indicating a prolonged exposure window that could have allowed extensive exploitation. The flaw specifically affects the Gutenberg block editor integration where user-provided content is not adequately sanitized before being rendered in web pages, creating a pathway for attackers to inject malicious payloads that persist across user sessions.
The technical implementation of this vulnerability stems from insufficient input validation and output sanitization mechanisms within the plugin's rendering engine. When users create or modify page layouts using the Caxton Gutenberg blocks, the plugin processes user-entered content without proper HTML escaping or content validation. This allows malicious actors to inject script tags, event handlers, or other malicious code through form fields, text areas, or configuration parameters that are then stored in the database. The stored nature of this XSS vulnerability means that the malicious scripts are not limited to a single page view but will execute every time the affected page is loaded, making it particularly dangerous for administrators and regular users who might encounter the malicious content. The vulnerability aligns with CWE-79 which specifically addresses Cross-site Scripting flaws and represents a classic case of inadequate input sanitization in web applications.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with significant privileges within the affected WordPress environment. Successful exploitation allows attackers to steal user sessions, modify content, redirect users to malicious sites, or even install additional malware. The stored XSS nature means that the attack can persist long after the initial injection, potentially affecting multiple users over extended periods. Attackers could leverage this vulnerability to target administrators with elevated privileges, potentially leading to complete compromise of the WordPress installation. The vulnerability affects not just the end users but also the site owners who may unknowingly host malicious content that could be used for phishing attacks or to spread malware to visitors. This type of vulnerability also creates opportunities for attackers to use the compromised site as a launching point for further attacks against other systems or to establish command and control infrastructure.
Mitigation strategies for CVE-2024-37948 should prioritize immediate plugin updates to versions that address the XSS vulnerability, as this represents the most effective defense against the known exploit. Organizations should also implement Content Security Policy headers to limit script execution and prevent unauthorized code injection, though this provides only partial protection against stored XSS attacks. Regular security audits of WordPress plugins and themes should be conducted to identify similar vulnerabilities, with particular attention to input validation mechanisms in any plugin that processes user-generated content. Network monitoring should be enhanced to detect anomalous traffic patterns that might indicate exploitation attempts, and user access controls should be reviewed to minimize the impact of potential compromise. The vulnerability also underscores the importance of maintaining updated security practices such as the principle of least privilege, regular security patching, and implementing web application firewalls to detect and block malicious requests. This issue demonstrates the critical need for security-conscious development practices and proper input validation as outlined in the OWASP Top Ten security requirements. The ATT&CK framework categorizes this vulnerability under T1566 - Phishing and T1059 - Command and Scripting Interpreter, highlighting the potential for both initial access and execution phases in attack chains. Organizations should also consider implementing automated security scanning tools that can detect similar vulnerabilities in their WordPress environments, as the complexity of modern web applications increases the likelihood of such flaws. The remediation process should include thorough testing to ensure that the patch does not introduce compatibility issues with existing site functionality while also verifying that all user content has been properly sanitized to prevent future exploitation attempts.