CVE-2024-32542 in Bulk Block Converter Plugin
Summary
by MITRE • 04/17/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Organic Themes Bulk Block Converter allows Reflected XSS.This issue affects Bulk Block Converter: from n/a through 1.0.1.
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Analysis
by VulDB Data Team • 04/05/2025
This vulnerability represents a classic cross-site scripting flaw that exploits improper input sanitization during web page generation within the Organic Themes Bulk Block Converter plugin. The reflected XSS vulnerability occurs when user-supplied input is directly incorporated into dynamically generated web pages without adequate sanitization or encoding mechanisms. Attackers can craft malicious payloads that, when executed in a victim's browser, can steal session cookies, perform unauthorized actions, or redirect users to malicious sites. The vulnerability specifically impacts versions of the Bulk Block Converter plugin ranging from the initial release through version 1.0.1, indicating this flaw has persisted across multiple iterations of the software.
The technical implementation of this vulnerability stems from the plugin's failure to properly neutralize user input before incorporating it into HTML output. When the plugin processes user requests containing malicious script code, it fails to apply appropriate output encoding or sanitization techniques that would prevent the injected code from executing in the victim's browser context. This reflects a common weakness categorized under CWE-79, which specifically addresses cross-site scripting vulnerabilities where input data is not properly sanitized before being rendered in web pages. The reflected nature of this vulnerability means that malicious input must be passed through the application to the victim's browser, typically via URL parameters or form submissions, making it particularly dangerous in web environments where user interaction is expected.
The operational impact of this vulnerability extends beyond simple script execution as it can enable sophisticated attack vectors including session hijacking, credential theft, and phishing attacks. An attacker could craft a malicious URL containing XSS payloads that, when clicked by an authenticated user, would execute in the context of that user's session. This could result in unauthorized administrative actions, data exfiltration, or complete account compromise. The vulnerability affects WordPress users who rely on the Organic Themes Bulk Block Converter plugin, potentially exposing thousands of websites to these risks. The reflected XSS nature makes it particularly challenging to defend against as it requires real-time input validation rather than static sanitization, and it can be exploited through various vectors including social engineering campaigns targeting administrators.
Mitigation strategies should focus on implementing proper input validation and output encoding mechanisms that align with established security frameworks and best practices. Organizations should immediately update to the latest version of the Bulk Block Converter plugin where this vulnerability has been addressed. The solution involves implementing strict input sanitization using functions like htmlspecialchars in PHP environments or equivalent encoding mechanisms in other platforms. Security controls should include Content Security Policy headers to limit script execution, proper parameter validation at all input points, and regular security audits of web applications. This vulnerability demonstrates the critical importance of input validation and output encoding as outlined in the OWASP Top Ten and aligns with ATT&CK technique T1203 which covers Exploitation for Client Execution. Organizations should also implement automated scanning tools to identify similar vulnerabilities in other plugins and themes, as reflected XSS vulnerabilities often indicate broader security gaps in web application development practices.