How severe is CVE-2025-9803?

CVE-2025-9803 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-9803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-9803?

CVE-2025-9803 affects Lunary. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-9803?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-9803 have an EU (EUVD) identifier?

Yes. CVE-2025-9803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199529.

When was CVE-2025-9803 published?

CVE-2025-9803 was published on 2025-11-25 and last updated on 2026-06-17.

CVE-2025-9803

CVE-2025-9803 is a high-severity vulnerability in Lunary with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199529
Weakness: CWE-863
Affected product: Lunary
Published: 2025-11-25
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-9803?: CVE-2025-9803 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-9803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-9803?: CVE-2025-9803 affects Lunary. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-9803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-9803 have an EU (EUVD) identifier?: Yes. CVE-2025-9803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199529.
When was CVE-2025-9803 published?: CVE-2025-9803 was published on 2025-11-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lunary:lunary:1.9.34:*:*:*:*:*:*:*

More vulnerabilities in Lunary

CVE-2024-9095 — Critical (CVSS 9.8): In lunary-ai/lunary version v1.4.28, the /bigquery API route lacks proper access control, allowing any logged-in user…
CVE-2024-7456 — Critical (CVSS 9.8): A SQL injection vulnerability exists in the `/api/v1/external-users` route of lunary-ai/lunary version v1.4.2. The…
CVE-2024-4146 — Critical (CVSS 9.8): In lunary-ai/lunary version v1.2.13, an incorrect authorization vulnerability exists that allows unauthorized users to…
CVE-2025-5352 — Critical (CVSS 9.6): A critical stored Cross-Site Scripting (XSS) vulnerability exists in the Analytics component of lunary-ai/lunary…
CVE-2024-5328 — Critical (CVSS 9.3): A Server-Side Request Forgery (SSRF) vulnerability exists in the lunary-ai/lunary application, specifically within the…
CVE-2024-7475 — Critical (CVSS 9.1): An improper access control vulnerability in lunary-ai/lunary version 1.3.2 allows an attacker to update the SAML…

All CVEs affecting Lunary →

Other CWE-863 (Incorrect Authorization) vulnerabilities

CVE-2026-48286 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9396 and earlier are affected by an Incorrect Authorization…
CVE-2026-48303 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by an Incorrect Authorization…
CVE-2026-44330 — Critical (CVSS 10.0): free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the…
CVE-2026-46595 — Critical (CVSS 10.0): Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of…
CVE-2026-33105 — Critical (CVSS 10.0): Improper authorization in Microsoft Azure Kubernetes Service allows an unauthorized attacker to elevate privileges over…
CVE-2026-32213 — Critical (CVSS 10.0): Improper authorization in Azure AI Foundry allows an unauthorized attacker to elevate privileges over a network.

Browse all CWE-863 (Incorrect Authorization) vulnerabilities →