CVE-2025-9803CWE-287CWE-863broken-access-control

CVE-2025-9803

High · published November 25, 2025

CVSS v3.1
8.8
EPSS
0%
Percentile
39.9
In the wild
Unconfirmed
What it is

🚨 A simple flaw in Google OAuth could hand over the keys to your account! The Lunary AI version 1.9.34 lacks proper validation, making unauthorized logins a breeze for attackers. 🔥 Think of it like a hotel that lets anyone with a reservation slip check in, regardless of whether they actually booked a room — only a diligent front desk clerk could prevent this mix-up! If exploited, an attacker could waltz right into users’ accounts, accessing sensitive data and potentially wreaking havoc. This vulnerability could lead to identity theft, unauthorized transactions, or leaking user information — absolutely devastating!

Put simply

Think of it like a hotel that lets anyone with a reservation slip check in, regardless of whether they actually booked a room — only a diligent front desk clerk could prevent this mix-up! The vulnerability arises from improper authentication within the Google OAuth integration, where the application fails to verify the 'aud' (audience) field in the access token issued by Google. This allows attackers to use tokens meant for other applications to gain unauthorized access to user accounts.

What to do

If exploited, an attacker could waltz right into users’ accounts, accessing sensitive data and potentially wreaking havoc. This vulnerability could lead to identity theft, unauthorized transactions, or leaking user information — absolutely devastating! To protect yourself, upgrade to Lunary AI version 1.9.35 immediately. Additionally, review your authentication procedures to ensure proper validation of all incoming tokens. You've got this! By following these steps, you'll help safeguard user accounts and enhance your security posture. 🛡️

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00472 · 39.9th percentile
Weaknesses
CWE-287 · Improper Authentication; CWE-863 · Incorrect Authorization
Published
2025-11-25T06:15Z
Affected products (1)
ProductVersionsFixed in
lunary/lunaryall versions—
References (3)
EPSS history
Timeline
  • 25 NOV 00:00Z
    Improper Authentication in lunary-ai/lunary
    cvelistv5