CVE-2026-28187 in Knowledge Base for Documentation FAQs with AI Assistance Plugin
Summary
by MITRE • 08/13/2026
Unauthenticated Cross Site Scripting (XSS) in Knowledge Base for Documentation, FAQs with AI Assistance <= 17.211.0 versions.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/13/2026
This vulnerability represents a critical unauthenticated cross site scripting flaw that affects the Knowledge Base for Documentation, FAQs with AI Assistance component in versions up to and including 17.211.0. The issue stems from insufficient input validation and output encoding mechanisms within the web application's user interface elements, particularly in areas where user-generated content or dynamic data is displayed without proper sanitization. Attackers can exploit this weakness by injecting malicious javascript code through parameters or input fields that are subsequently rendered to other users without adequate protection measures.
The technical implementation of this vulnerability allows threat actors to execute arbitrary script code within the context of a victim's browser session, potentially leading to session hijacking, credential theft, or redirection to malicious websites. This flaw exists in the application's handling of user inputs and dynamic content rendering processes, where data flows from user interaction through backend processing to frontend display without proper security controls. The vulnerability can be exploited through various vectors including but not limited to URL parameters, form submissions, or API endpoints that process user-provided content for display purposes.
The operational impact of this XSS vulnerability extends beyond simple script execution as it can enable attackers to establish persistent access patterns within the affected environment. When successfully exploited, malicious scripts can capture keystrokes, manipulate browser sessions, redirect users to phishing sites, or even perform actions on behalf of authenticated users. This particular vulnerability affects organizations that rely heavily on knowledge base systems for documentation and FAQ management, potentially exposing sensitive organizational information and undermining user trust in the platform's security posture.
Security controls should be implemented immediately to address this vulnerability through comprehensive input validation, output encoding, and content security policy enforcement mechanisms. Organizations must ensure proper sanitization of all user inputs before processing and rendering, implement strict Content Security Policy headers to prevent unauthorized script execution, and conduct regular security testing including automated scanning and manual penetration testing. This vulnerability aligns with CWE-79 which specifically addresses cross site scripting flaws, and maps to ATT&CK technique T1059.007 for scripting languages and T1566 for phishing attacks that can leverage such vulnerabilities to establish initial access or maintain persistence within target environments.
Mitigation strategies should include immediate deployment of security patches if available, implementation of web application firewalls with XSS detection capabilities, regular security awareness training for developers on secure coding practices, and comprehensive monitoring of application logs for suspicious activities. Additionally organizations should establish robust input validation frameworks that follow OWASP Secure Coding Practices and implement proper session management controls to prevent unauthorized access to user accounts through compromised browser sessions. The vulnerability underscores the critical importance of maintaining up-to-date security controls and implementing defense-in-depth strategies to protect against increasingly sophisticated web-based attack vectors targeting documentation and knowledge management systems.