1Panel-dev MaxKB Public Chat static_headers_middleware.py StaticHeadersMiddleware क्रॉस साइट स्क्रिप्टिंग

The XSS vulnerability in 1Panel-dev MaxKB allows an attacker to inject arbitrary JavaScript code into the application's web pages. This code can then be executed in the context of a user's browser, potentially enabling the attacker to steal session cookies, redirect users to malicious websites, or deface the application. Given the public nature of the exploit, the risk of immediate exploitation is elevated. The Public Chat Interface component is likely used for user interaction, making it a prime target for attackers seeking to compromise user accounts or gain access to sensitive information. The impact could extend beyond the immediate application, potentially affecting other systems accessible from the compromised user's session.

Organizations utilizing 1Panel-dev MaxKB in their deployments, particularly those with publicly accessible chat interfaces, are at risk. Shared hosting environments where multiple users share the same 1Panel-dev MaxKB instance are especially vulnerable, as a compromise of one user could potentially affect others. Legacy configurations or deployments that have not been regularly updated are also at increased risk.

• php: Examine application logs for requests containing suspicious characters or patterns in the 'Name' parameter. Use grep to search for patterns like <script> or javascript: within the logs.

grep -i '<script|javascript:' /var/log/apache2/access.log

• generic web: Use curl to test the affected endpoint with various payloads. Check the response headers for signs of XSS.

curl -X POST -d "Name=<script>alert('XSS')</script>" http://your-1panel-maxkb-url/chat

1. 2026-04-11Disclosure

   disclosure

2. 2026-04-11PoC

   poc

3. 2026-04-11Patch

   patch

1. आरक्षित2026-04-11
2. प्रकाशित2026-04-11
3. संशोधित2026-04-13
4. EPSS अद्यतन2026-04-19

The primary mitigation for CVE-2026-6106 is to upgrade 1Panel-dev MaxKB to version 2.8.0, which contains the fix (commit 026a2d623e2aa5efa67c4834651e79d5d7cab1da). If upgrading is not immediately feasible, consider implementing temporary workarounds such as input validation and output encoding on the 'Name' parameter within the StaticHeadersMiddleware function. Web application firewalls (WAFs) configured to detect and block XSS payloads can also provide a layer of protection. Monitor application logs for suspicious activity, particularly requests containing unusual characters or patterns in the 'Name' parameter. After upgrade, confirm the vulnerability is resolved by attempting to inject a simple XSS payload into the 'Name' field and verifying that it is properly sanitized.