CVE-2026-66390
Received Received - Intake

Reflected Cross-Site Scripting in Apache Wicket

Publication date: 2026-07-27

Last updated on: 2026-07-27

Assigner: Apache Software Foundation

Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Wicket. This issue affects Apache Wicket: from 9.0.0 through 9.23.0, from 10.0.0 through 10.9.0. Users are recommended to upgrade to version 10.10.0, which fixes the issue.

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Meta Information

Published
2026-07-27
Last Modified
2026-07-27
Generated
2026-07-27
AI Q&A
2026-07-27
EPSS Evaluated
N/A
NVD
CVE-2026-66390
EUVD
EUVD-2026-49372

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
apache wicket From 9.0.0 (inc) to 9.23.0 (inc)
apache wicket From 10.0.0 (inc) to 10.9.0 (inc)
apache wicket 10.10.0

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 Cross-site Scripting (XSS) vulnerability in Apache Wicket versions 9.0.0 through 9.23.0 and 10.0.0 through 10.9.0. It occurs due to improper neutralization of input during web page generation, allowing attackers to inject malicious scripts into web pages viewed by other users.

Detection Guidance

Detection typically involves checking for reflected or stored cross-site scripting (XSS) in web applications using Apache Wicket versions 9.0.0 through 9.23.0 or 10.0.0 through 10.9.0. Inspect web application logs for suspicious input patterns or use security scanners like OWASP ZAP or Burp Suite to identify XSS vulnerabilities in Wicket-based applications.

Impact Analysis

This vulnerability can allow attackers to execute arbitrary JavaScript in the context of a user's browser session. This may lead to theft of session cookies, sensitive data exposure, or unauthorized actions performed on behalf of the user.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Organizations may face fines, legal liabilities, and reputational damage if exploited.

Mitigation Strategies
  • Upgrade Apache Wicket to version 10.10.0 or later to address the vulnerability.
  • Apply input validation and output encoding in web applications to prevent XSS attacks.
  • Monitor for unusual activity or unauthorized access attempts in web applications.

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