CVE-2026-40804
Deferred Deferred - Pending Action

Reflected Cross-Site Scripting in aBlocks by Kodezen LLC

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: Patchstack

Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kodezen LLC aBlocks ablocks allows Reflected XSS.This issue affects aBlocks: from n/a through 2.16.0.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-09
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-40804
EUVD
EUVD-2026-95158

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Kodezen LLC aBlocks 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a reflected cross-site scripting (XSS) vulnerability in the Kodezen LLC aBlocks plugin. It occurs when user input is improperly neutralized during web page generation, allowing malicious scripts to be executed in a victim's browser.

Detection Guidance

Detecting reflected XSS vulnerabilities like CVE-2026-40804 typically involves manual testing or automated tools. Check web application inputs (URL parameters, form fields) for improper input validation. Use browser developer tools to inspect responses for unescaped user input. Tools like OWASP ZAP or Burp Suite can automate detection by sending test payloads.

Impact Analysis

An attacker could trick you into clicking a malicious link, which would execute arbitrary JavaScript in your browser. This could lead to theft of session cookies, account takeover, or defacement of web pages you visit.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection requirements and HIPAA's security rules for protected health information.

Mitigation Strategies

Immediately update aBlocks to the latest version (2.16.0 or later) to patch the vulnerability. If updating is not possible, implement input validation and output encoding for all user-supplied data. Use Content Security Policy (CSP) headers to mitigate XSS impact. Disable or restrict access to vulnerable endpoints if feasible.

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