CVE-2025-9803 Improper Authentication in lunary-ai/lunary

Critical 9.3 Published 25 Nov 2025 Updated 25 Nov 2025

Attackers can take over user accounts by using Google OAuth tokens from malicious apps due to missing audience verification.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-9803?

CVE-2025-9803 is a critical authentication bypass vulnerability in Lunary Lunary, published on 25 Nov 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

lunary-ai/lunary version 1.9.34 is vulnerable to an account takeover due to improper authentication in the Google OAuth integration. The application fails to verify the 'aud' (audience) field in the access token issued by Google, which is crucial for ensuring the token is intended for the application. This oversight allows attackers to use tokens issued to malicious applications to gain unauthorized access to user accounts. The issue is resolved in version 1.9.35.

Weakness: CWE-863, CWE-287

Which versions are affected by CVE-2025-9803?

It affects 1 product.

Products include Lunary Lunary.

How do I fix CVE-2025-9803?

No fix has been published for CVE-2025-9803 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2025-9803 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9803 exists.

All Lunary Lunary vulnerabilities

Sources

Also known as GHSA-j694-j6ff-75p6.