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Vulnerabilities

Vulnerability · CVE-2025-68481

FastAPI Users allows users to quickly add a registration and authentication system to their FastAPI project.

Published Dec 19, 2025 · catalog updated Dec 19, 2025 · FastAPI Users allows users

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-68481. EPSS is 0.26%. Act only if a listed version of FastAPI Users allows users is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (FastAPI Users allows users).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.26%
Remediation
Version ranges on file
Affected products
vendor fastapi-users fastapi-users < 15.0.2

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. is always called with an empty dict, so the resulting JWT only contains the fixed audience claim plus an expiration timestamp. On callback, the library merely checks that the JWT verifies under and is unexpired; there is no attempt to match the state value to the browser that initiated the OAuth req

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor fastapi-users fastapi-users < 15.0.2< 15.0.2

How to fix CVE-2025-68481

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-68481. EPSS is 0.26%. Act only if a listed version of FastAPI Users allows users is installed.

Which versions are affected?

Compare what you have installed with fastapi-users fastapi-users < 15.0.2 < 15.0.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.26%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

FastAPI security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 19, 2025 · EUVD

    Detected

    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. is always called with an empty dict, so the resulting JWT only contains the fixed audience claim plu

  2. Dec 19, 2025 · EUVD

    Updated

    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. is always called with an empty dict, so the resulting JWT only contains the fixed audience claim plu

Sources

  • CVE.orgVulnerability recordCVE-2025-68481

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-68481

    30-day exploitation probability 0.26%

    first.org
  • EUVDVulnerability recordEUVD-2025-204614

    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 initia

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 2, 2026
  • CVE.orgNov 2, 2026
  • EUVDNov 1, 2026