CVE-2024-32961 in Blocksy Plugin
Summary
by MITRE • 04/25/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in creativethemeshq Blocksy blocksy.This issue affects Blocksy: from n/a through <= 2.0.33.
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Analysis
by VulDB Data Team • 04/02/2026
The CVE-2024-32961 vulnerability represents a critical cross-site scripting flaw within the Blocksy theme framework developed by creativethemeshq. This vulnerability exists in the web page generation process where input validation and sanitization mechanisms fail to properly neutralize potentially malicious user-supplied data. The flaw specifically impacts versions of the Blocksy theme ranging from the initial release through version 2.0.33, creating a persistent security risk for WordPress installations utilizing this theme. The vulnerability stems from inadequate filtering of user input that occurs during the dynamic generation of web pages, allowing attackers to inject malicious scripts that execute in the context of other users' browsers.
This XSS vulnerability operates through the improper handling of input parameters that are subsequently rendered into web page content without adequate sanitization. When users interact with the theme's blocks or dynamic content generation features, malicious input can be processed and stored within the theme's rendering pipeline. The vulnerability is classified as a CWE-79 Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security where user-supplied data is not properly escaped or filtered before being included in dynamically generated HTML content. The attack vector typically involves injecting malicious JavaScript code through form fields, URL parameters, or other user-controllable inputs that are then rendered on pages accessible to other users.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a range of malicious activities including session hijacking, credential theft, data exfiltration, and privilege escalation. An attacker could potentially exploit this vulnerability to execute arbitrary code within the context of a victim's browser session, allowing them to access sensitive information, modify website content, or redirect users to malicious sites. The vulnerability particularly affects WordPress sites using the Blocksy theme where users can input content through various interface elements, making it a significant concern for websites that rely on user-generated content or administrative inputs. The persistent nature of this flaw across multiple versions indicates a fundamental design issue in the theme's input handling mechanisms.
Mitigation strategies for CVE-2024-32961 should prioritize immediate patching of affected versions to the latest stable release where the XSS vulnerability has been addressed. Organizations should implement comprehensive input validation and output encoding mechanisms to prevent malicious data from being rendered in web pages. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to mitigate the impact of successful XSS attacks. Security teams should conduct thorough vulnerability assessments of their WordPress installations to identify any other potential XSS vulnerabilities within the theme ecosystem or related plugins. Regular security monitoring and automated scanning should be implemented to detect similar issues in other components of the web application stack. The vulnerability also highlights the importance of following secure coding practices and adhering to OWASP Top Ten security guidelines for preventing cross-site scripting attacks. Organizations should consider implementing web application firewalls and input sanitization layers as additional protective measures against this class of vulnerability.