CVE-2024-56258 in Magazine Blocks Plugin
Summary
by MITRE • 01/02/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPBlockArt Magazine Blocks allows Stored XSS.This issue affects Magazine Blocks: from n/a through 1.3.20.
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Analysis
by VulDB Data Team • 02/16/2025
This vulnerability represents a critical cross-site scripting flaw in the WPBlockArt Magazine Blocks plugin for WordPress, specifically impacting versions through 1.3.20. The issue stems from improper input sanitization during web page generation processes, creating an avenue for attackers to inject malicious scripts that persist in the application's database. The vulnerability classifies under CWE-79 which defines improper neutralization of input during web page generation, making it a classic stored cross-site scripting vulnerability where malicious payloads are stored and subsequently executed in users' browsers. This weakness allows threat actors to craft malicious content that gets rendered in the context of other users' sessions, potentially leading to session hijacking, credential theft, or arbitrary code execution within the victim's browser environment.
The technical exploitation of this vulnerability occurs when malicious input is accepted through plugin interfaces or content management features without proper validation or sanitization. Attackers can inject malicious javascript code through various input fields that are then stored in the database, making the payload persistent across user sessions. When other users view pages generated by the plugin, their browsers execute the stored malicious scripts, creating a vector for various attack scenarios including cookie theft, redirection to malicious sites, or modification of webpage content. The vulnerability is particularly dangerous because it allows attackers to establish persistent footholds within the application's user base, as the malicious code executes automatically whenever affected pages are loaded. This stored nature of the XSS vulnerability means that the attack payload remains active even after the initial injection, unlike reflected XSS which requires user interaction with a crafted link.
The operational impact of this vulnerability extends beyond simple script execution, potentially enabling sophisticated attack chains that leverage the compromised user sessions. An attacker could exploit this vulnerability to steal administrator credentials, modify content, or redirect users to phishing sites that appear legitimate. The persistence of stored XSS makes it particularly valuable for attackers seeking long-term access to the affected WordPress installation, as the malicious code continues to execute for all users until the vulnerability is patched. This vulnerability affects not only individual users but also the overall security posture of websites using the affected plugin, potentially leading to complete compromise of the WordPress installation. The impact is amplified when considering that WordPress installations often contain sensitive data and administrative access, making successful exploitation particularly damaging for website owners and their visitors.
Mitigation strategies should focus on immediate patching of the affected plugin to version 1.3.21 or later, which addresses the input sanitization issues. Administrators should also implement additional security measures including regular security audits of installed plugins, implementing content security policies to limit script execution, and monitoring for suspicious content or user activities. The vulnerability highlights the importance of input validation and output encoding practices, which align with ATT&CK technique T1566.001 for initial access through malicious content and T1059.001 for execution through script-based attacks. Security teams should also consider implementing web application firewalls to detect and block suspicious input patterns, while maintaining up-to-date threat intelligence to identify potential exploitation attempts. Regular security training for content managers and administrators is essential to prevent accidental introduction of malicious content through the plugin's user interfaces. The vulnerability serves as a reminder of the critical importance of maintaining updated software components and implementing proper security controls around user-generated content processing in web applications.