CVE-2025-9803: lunary Auth Bypass — Exploit

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.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-287 Improper Authentication

CWE-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
lunary	lunary	All

References

Exploits

https://huntr.com/bounties/4734f35f-514c-4d10-98fa-3a54514f6af6 https://huntr.com/bounties/4734f35f-514c-4d10-98fa-3a54514f6af6

Other References

https://github.com/lunary-ai/lunary/commit/95a2cc8e012bf5f089edbfa072ba66dcb7e10d91

Frequently Asked Questions

What is CVE-2025-9803? +

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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-9803? +

CVE-2025-9803 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-9803? +

CVE-2025-9803 affects products from lunary, specifically: lunary. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-9803? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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