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CWE-639

1,721 CVEs • Abstraction: Base • Likelihood of Exploit: High

Authorization Bypass Through User-Controlled Key

The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

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CVEs (1,721)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
CVE-2012-5571
1Openstack
2Essex
Folsom
Apr 29, 2026
Dec 18, 2012
N/A· v4
5.4 MEDIUM· v3
3.5 LOW· v2
A flaw was found in OpenStack Keystone. This vulnerability allows remote authenticated users to bypass intended authorization restrictions. This occurs because OpenStack Keystone does not properly handle EC2 (Elastic Com...Show more
A flaw was found in OpenStack Keystone. This vulnerability allows remote authenticated users to bypass intended authorization restrictions. This occurs because OpenStack Keystone does not properly handle EC2 (Elastic Compute Cloud) tokens when a user's role has been removed from a tenant. An attacker can leverage a token associated with a removed user role to gain unauthorized access.Show less