Stored Cross-Site Scripting in MaxKB AI Assistant by 1Panel
CVE-2026-39425

5.1MEDIUM

Key Information:

Vendor

1panel-dev

Status
Maxkb
Vendor
CVE Published:
14 April 2026

What is CVE-2026-39425?

The MaxKB AI assistant is susceptible to a Stored Cross-Site Scripting (XSS) vulnerability that affects versions up to 2.7.1. This security flaw allows authenticated users to inject malicious HTML and JavaScript into the Application prologue field. The application does not adequately sanitize or encode HTML entities when creating or updating entries via its API. This results in the raw payload being stored directly into the database and rendered on the frontend using unsafe mechanisms that trust <html_rander> tags. An attacker can exploit this vulnerability to execute persistent XSS attacks, which may enable session hijacking or unauthorized actions, such as deleting workspaces or accessing sensitive information. The issue has been resolved in version 2.8.0.

Affected Version(s)

MaxKB < 2.8.0

References

https://github.com/1Panel-dev/MaxKB/security/advisories/G...
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https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0
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CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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