CVE-2024-47355 in Cozy Blocks Plugin
Summary
by MITRE • 10/06/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CozyThemes Cozy Blocks cozy-addons allows Stored XSS.This issue affects Cozy Blocks: from n/a through <= 2.0.11.
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Analysis
by VulDB Data Team • 04/05/2026
The vulnerability identified as CVE-2024-47355 represents a critical cross-site scripting flaw within the CozyThemes Cozy Blocks cozy-addons plugin, specifically impacting versions through 2.0.11. This issue falls under the category of improper input neutralization during web page generation, creating a persistent security risk for WordPress sites utilizing this plugin. The vulnerability enables attackers to inject malicious scripts that can execute in the context of other users' browsers, potentially leading to unauthorized access, data theft, or further exploitation of the compromised systems.
The technical implementation of this stored cross-site scripting vulnerability occurs when the plugin fails to properly sanitize or escape user-supplied input before incorporating it into dynamically generated web pages. This flaw allows malicious actors to store malicious code within the plugin's data structures, which then executes whenever legitimate users view pages containing the compromised content. The vulnerability is classified as CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a well-established category of web application security flaws that has been documented in numerous security frameworks and standards. The attack vector typically involves an authenticated user with sufficient privileges to modify plugin settings or content, as the stored nature of the vulnerability requires initial injection before the malicious payload can be executed.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and potentially full system compromise. When exploited, the stored XSS attack can affect multiple users who view pages containing the malicious content, making it particularly dangerous in multi-user environments. The vulnerability affects WordPress installations where the Cozy Blocks cozy-addons plugin is actively used, potentially compromising thousands of websites if the plugin is widely deployed. Security researchers have noted that this type of vulnerability is particularly concerning because it can be leveraged to create persistent backdoors or to escalate privileges within the affected systems, as outlined in the ATT&CK framework under techniques related to client-side attacks and credential access.
Mitigation strategies for CVE-2024-47355 should prioritize immediate plugin updates to versions that address the stored XSS vulnerability, as this represents the most effective defense against exploitation. Organizations should also implement input validation and output encoding mechanisms to prevent similar issues in other custom or third-party plugins. Security monitoring should include regular scanning for vulnerable plugin versions and implementation of web application firewalls to detect and block suspicious script injection attempts. Additionally, administrators should enforce principle of least privilege access controls and implement regular security audits to identify potential attack vectors. The vulnerability demonstrates the importance of proper input sanitization and output escaping practices in web application development, as recommended by security standards including OWASP Top Ten and NIST cybersecurity guidelines. Organizations should also consider implementing Content Security Policy headers to provide an additional layer of protection against script execution, though this should not be considered a replacement for proper input validation.