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CVE-2025-68481: FastAPI Users allows users to quickly add a registration and authentication system to their FastAPI project

30
Routine
MEDIUM 5.9UPGRADE

CVE-2025-68481 is a medium-severity flaw (CVSS 5.9) affecting fastapi users. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FastAPI Users allows users to quickly add a registration and authentication system to their FastAPI project. Prior to version 15.0.2, the OAuth login state tokens are completely stateless and carry no per-request entropy or any data that could link them to the session that initiated the OAuth flow. `generate_state_token()` is always called with an empty `state_data` dict, so the resulting JWT only contains the fixed audience claim plus an expirat

Why this priority

  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score5.9 (Medium)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionRequired
EPSS exploit chance0.3% (top 82%)
CISA exploited listNo
WeaknessCWE-285, CWE-352
Published2025-12-19
Last modified2026-10-13
Publisher (CNA): GitHub, Inc. · Vendor: fastapi-users project

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Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

fastapi-users project fastapi users UPGRADE
Affected: < 15.0.2
Fixed in: 15.0.2
Safe to downgrade to: no unaffected older release
1. Check installed version
pip show fastapi-users
2. UPGRADE to 15.0.2
pip install --upgrade "fastapi-users>=15.0.2"
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-68481?

fastapi users: upgrade to 15.0.2. Exact commands for each OS are on this page.

Is CVE-2025-68481 being exploited?

CVE-2025-68481 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-68481 affect?

CVE-2025-68481 affects fastapi users. Severity is medium (CVSS 5.9). FastAPI Users allows users to quickly add a registration and authentication system to their FastAPI project. Prior to version 15.0.2, the OAuth login state tokens are completely stateless and carry no per-request entropy or any data that co

How urgent is CVE-2025-68481?

Priority 30/100. Public exploit reference

Software pages

FastAPI vulnerabilities

References

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