CVE-2024-47385 in Essential Blocks for Gutenberg Plugin
Summary
by MITRE • 10/05/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPDeveloper Essential Blocks for Gutenberg essential-blocks allows Stored XSS.This issue affects Essential Blocks for Gutenberg: from n/a through <= 4.8.4.
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Analysis
by VulDB Data Team • 04/05/2026
The vulnerability identified as CVE-2024-47385 represents a critical cross-site scripting flaw within the WPDeveloper Essential Blocks for Gutenberg plugin, specifically impacting versions through 4.8.4. This weakness falls under the category of improper input neutralization during web page generation, creating a persistent security risk that allows malicious actors to inject malicious scripts into web pages viewed by other users. The vulnerability stems from insufficient sanitization of user input parameters that are subsequently rendered in web page content without proper encoding or validation mechanisms. The affected plugin serves as a popular block library for WordPress users, making this vulnerability particularly dangerous as it could be exploited across numerous websites utilizing the plugin.
The technical implementation of this stored XSS vulnerability occurs when user-supplied data is processed and stored within the plugin's database or configuration files, then later retrieved and displayed in web pages without appropriate output encoding. Attackers can leverage this flaw by crafting malicious payloads that contain script code within input fields or configuration settings that are then stored and executed when other users view pages containing the compromised content. This stored nature of the vulnerability means that the malicious code persists in the system and executes automatically whenever affected pages are accessed, rather than requiring users to click on malicious links or perform specific actions. The vulnerability specifically affects the essential-blocks plugin, which is widely used across WordPress installations, amplifying the potential impact of exploitation.
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, defacement of web pages, data exfiltration, and redirection to malicious sites. The stored nature of the XSS attack means that once a malicious payload is injected, it can affect multiple users over time without requiring repeated exploitation attempts. This vulnerability directly violates security principles outlined in CWE-79, which addresses cross-site scripting vulnerabilities, and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments or links. The impact is particularly severe for WordPress sites that rely heavily on the essential-blocks plugin for content creation and management, as these sites become potential vectors for broader attacks against their user bases.
Mitigation strategies for this vulnerability should prioritize immediate plugin updates to versions that address the XSS flaw, as WPDeveloper has likely released patches to resolve the input sanitization issues. Organizations should implement comprehensive input validation and output encoding mechanisms, ensuring that all user-supplied data is properly sanitized before storage and rendering. Security measures should include regular vulnerability scanning of WordPress installations, implementation of content security policies to prevent script execution, and monitoring for suspicious activity within plugin configurations. Additionally, administrators should consider implementing web application firewalls and regular security audits to identify and remediate similar vulnerabilities across their WordPress environments. The remediation process should also include educating users about the risks of entering untrusted data into plugin settings and implementing least privilege access controls for plugin management functions.