{"cve":"CVE-2012-5571","nvd":{"published":"2012-12-18T01:55:03.570","modified":"2026-10-30T19:17:25.990","status":"Modified","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-639","CWE-255"],"references":["http://lists.fedoraproject.org/pipermail/package-announce/2012-December/094286.html","http://rhn.redhat.com/errata/RHSA-2012-1556.html","http://rhn.redhat.com/errata/RHSA-2012-1557.html","http://secunia.com/advisories/51423","http://secunia.com/advisories/51436"],"products":["openstack:essex","openstack:folsom"],"source":"nvd","synced_at":"2026-10-30T19:40:38.187835185+00:00"},"epss":{"cve":"CVE-2012-5571","score":0.02055,"percentile":0.81259,"date":"2026-10-30"},"kev":null,"osv":[{"id":"GHSA-qvpr-qm6w-6rcc","url":"https://osv.dev/vulnerability/GHSA-qvpr-qm6w-6rcc","summary":"OpenStack Keystone intended authorization restrictions bypass","modified":"2026-06-10T19:15:10.363103049Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":["<8.0.0a0"],"fixed":["8.0.0a0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}