CVE-2012-5571: openstack essex
Vulnerability summary
CVE-2012-5571 is a medium (CVSS 5.4) vulnerability in openstack essex. EPSS estimates a 2.05% chance of exploitation in the next 30 days, higher than 80.9% of scored vulnerabilities.
Timeline
- 18-12-2012PublishedVulnerability first disclosed.
- 07-04-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 4 sources · 2 versions- NVDNIST5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- OSV · PypiEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
EPSS trend
Probability
2.05%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
0.00 pp
From 2.05% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-639Authorization Bypass Through User-Controlled KeyThe 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.
- CWE-255Credentials Management ErrorsWeaknesses in this category are related to the management of credentials.
Affected systems
Debian1 product
- keystone< 2012.1.1-11
PyPI1 product
- keystone< 8.0.0a0 | < 9d68b40cb9ea818c48152e6c712ff41586ad9653 | All versions (No fix recorded)
3 vendors · 4 products
