{"cve":"CVE-2020-12691","nvd":{"published":"2020-05-07T00:15:10.957","modified":"2026-06-17T02:52:08.603","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-863"],"references":["http://www.openwall.com/lists/oss-security/2020/05/07/2","https://bugs.launchpad.net/keystone/+bug/1872733","https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa%40%3Ccommits.druid.apache.org%3E","https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2%40%3Ccommits.druid.apache.org%3E","https://security.openstack.org/ossa/OSSA-2020-004.html"],"products":["canonical:ubuntu_linux","openstack:keystone"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-12691","score":0.04918,"percentile":0.92116,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-4427-7f3w-mqv6","url":"https://osv.dev/vulnerability/GHSA-4427-7f3w-mqv6","summary":"OpenStack Keystone V3 /credentials endpoint policy logic allows to change credentials owner or target project ID","modified":"2024-09-27T18:05:12.641365Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":["<15.0.1"],"fixed":["15.0.1"]},{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=16.0.0 <16.0.1"],"fixed":["16.0.1"]}]},{"id":"PYSEC-2020-55","url":"https://osv.dev/vulnerability/PYSEC-2020-55","summary":"","modified":"2026-06-10T17:01:55.558128916Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":["<15.0.1"],"fixed":["15.0.1"]}]}],"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."]}