CVE-2025-14546

Versions of the package fastapi-sso before 0.19.0 are vulnerable to Cross-site Request Forgery (CSRF) due to the improper validation of the OAuth state parameter during the authentication callback. While the get_login_url method allows for state generation, it does not persist the state or bind it to the user's session. Consequently, the verify_and_process method accepts the state received in the query parameters without verifying it against a trusted local value. This allows a remote attacker to trick a victim into visiting a malicious callback URL, which can result in the attacker's account being linked to the victim's internal account.

CVSS v3 6.3 MEDIUM

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.1 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/tomasvotava/fastapi-sso/commit/6117d1a5ad498ba57d671e8a059ebe20db5abe02
https://github.com/tomasvotava/fastapi-sso/issues/266
https://security.snyk.io/vuln/SNYK-PYTHON-FASTAPISSO-14386403

Configurations

No configuration.

History

19 Dec 2025, 05:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-19 05:16

Updated : 2025-12-19 18:00

NVD link : CVE-2025-14546

Mitre link : CVE-2025-14546

CVE.ORG link : CVE-2025-14546

JSON object : View

Products Affected

No product.

CWE

CWE-285

Improper Authorization

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