{"id":"CVE-2020-12691","aliases":["GHSA-4427-7f3w-mqv6","PYSEC-2020-55"],"url":"https://o3.security/vulnerability/CVE-2020-12691","summary":"OpenStack Keystone V3 /credentials endpoint policy logic allows to change credentials owner or target project ID","details":"An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any authenticated user can create an EC2 credential for themselves for a project that they have a specified role on, and then perform an update to the credential user and project, allowing them to masquerade as another user. This potentially allows a malicious user to act as the admin on a project another user has the admin role on, which can effectively grant that user global admin privileges.","published":"2020-05-07T00:15:10.957Z","modified":"2026-07-08T05:55:19.180602139Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.04918,"percentile":0.91479,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"keystone","fixedVersion":"15.0.1"},{"ecosystem":"PyPI","name":"keystone","fixedVersion":"16.0.1"}],"fix":{"url":"https://github.com/openstack/keystone/commit/37e9907a176dad6843819b1bec4946c3aecc4548","label":"openstack/keystone@37e9907"},"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa%40%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2%40%3Ccommits.druid.apache.org%3E"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/05/07/2"},{"type":"ADVISORY","url":"https://security.openstack.org/ossa/OSSA-2020-004.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4480-1/"},{"type":"ADVISORY","url":"https://www.openwall.com/lists/oss-security/2020/05/06/5"},{"type":"FIX","url":"https://bugs.launchpad.net/keystone/+bug/1872733"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-12691"},{"type":"WEB","url":"https://github.com/openstack/keystone/commit/37e9907a176dad6843819b1bec4946c3aecc4548"},{"type":"WEB","url":"https://github.com/openstack/keystone/commit/40cbb7bebd50276412daa1981ff5a7c7b3b899a5"},{"type":"WEB","url":"https://github.com/openstack/keystone/commit/95b2bbeab113d9f04d1c81f7f1b48bf692bce979"},{"type":"PACKAGE","url":"https://github.com/openstack/keystone"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/keystone/PYSEC-2020-55.yaml"},{"type":"WEB","url":"https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa@%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2@%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://usn.ubuntu.com/4480-1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:55:19.180602139Z"}}