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CVE-2025-9803

28
FAUCET Score

CVE-2025-9803 is a critical account takeover vulnerability affecting lunary-ai/lunary version 1.9.34. The flaw stems from improper validation of the 'aud' field in Google OAuth access tokens, allowing attackers to use tokens intended for other applications to gain unauthorized access to user accounts. This vulnerability carries a CVSS score of 8.8 HIGH, indicating a severe impact with high confidentiality, integrity, and availability risks, requiring user interaction but no authentication. While there is no known active exploitation or public exploit code, the vulnerability has garnered community attention and is resolved in version 1.9.35.

Impacted Technologies

VendorProductVersion(s)CPE
1.9.34CPE matchmatch criteria
cpe:2.3:a:lunary:lunary:1.9.34:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.3CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.8
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 41st percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / lunary-ai/lunary/commit/95a2cc8e012bf5f089edbfa072ba66dcb7e10d91
Broken Link
huntr.com / bounties/4734f35f-514c-4d10-98fa-3a54514f6af6
ExploitThird Party Advisory