CVE-2026-45665
HighSummary
In Open WebUI prior to version 0.8.0, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Banner component due to an improper sanitization order. This allows a compromised administrator to plant a malicious payload in the global banner, leading to privilege escalation.
Risk Assessment
This vulnerability enables an attacker to steal the Super Admin's session token, potentially leading to serious security breaches within the organization.
Recommendation
It is recommended to upgrade to version 0.8.0, where this vulnerability has been fixed, to secure the system against potential attacks.
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Original NVD description (English source)
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Banner component due to an improper sanitization order (specifically, DOMPurify is executed before the marked library). This vulnerability allows a compromised or malicious administrator to plant a malicious payload in the global banner. Crucially, this vector enables Privilege Escalation, as the malicious banner is rendered for all users, including the Super Admin (Primary Admin). Consequently, the payload successfully bypasses the existing security mechanism. An attacker can leverage this to steal the Super Admin's session token This vulnerability is fixed in 0.8.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS