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

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

- **Severity:** Critical 9.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N`)
- **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 available:** No
- **Published:** 25 Nov 2025
- **Updated:** 25 Nov 2025
- **Also known as:** GHSA-j694-j6ff-75p6

## 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 (Incorrect Authorization), CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2025-9803?

It affects 1 product.


Products: 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.

## Is CVE-2025-9803 being exploited?

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

## Other vulnerabilities in Lunary Lunary

- [CVE-2024-8999](https://insights.sbomify.com/CVE-2024-8999/): Improper Access Control in lunary-ai/lunary (critical 9.8)
- [CVE-2024-9095](https://insights.sbomify.com/CVE-2024-9095/): Improper Authorization in lunary-ai/lunary (critical 9.8)
- [CVE-2024-7456](https://insights.sbomify.com/CVE-2024-7456/): SQL Injection in lunary-ai/lunary (critical 9.8)
- [CVE-2024-4146](https://insights.sbomify.com/CVE-2024-4146/): Incorrect Authorization in lunary-ai/lunary (critical 9.8)
- [CVE-2024-5386](https://insights.sbomify.com/CVE-2024-5386/): Account Hijacking via Password Reset Token Leak in lunary-ai/lunary (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-9803 and fix it if it is affected.

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

Affected product: Lunary Lunary. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-9803/ (Markdown: https://insights.sbomify.com/CVE-2025-9803/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-9803
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-9803
- OSV: https://osv.dev/vulnerability/CVE-2025-9803

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-9803/
Summaries are generated and may contain mistakes; the official description above is the record.