Dashboard / CVE-2026-45665

CVE-2026-45665

HIGH
MEDIUM Priority: 0.03 BB Relevance: 51/100
Published: 2026-05-15 Modified: 2026-11-11 First seen: 2026-11-11 Status: active

Attack Surface

Network Low Complexity Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: High
UI: Required
S: Changed
C: High
I: High
A: None

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
openwebui open_webui < 0.8.0

References & Advisories (1)

Bug Bounty Relevance

51 / 100
✓ Network accessible
✓ Low complexity

CVSS Score

8.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

EPSS — Exploitation Probability

0.34%
Raw Score 0.003350
Percentile 27.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00335
2026-11-12
0.00335
2026-11-10
0.00335

Intelligence Sources

nvd ref →

External Links