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Vulnerability record · CVE-2020-12691 · published 7 May 2020

CVE-2020-12691: Openstack keystone incorrect authorization vulnerability

Openstack · Keystone

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.

8.8 CVSS 3.1 High EPSS 4.9% · top 8.2% CWE-863 · Incorrect authorization
8.8CVSS 3.1 base score, v2 6.5
4.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2020/05/07/2 Mailing ListThird Party Advisory
https://bugs.launchpad.net/keystone/+bug/1872733 PatchThird Party Advisory
https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa%40%3Ccommits.druid.apache
https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2%40%3Ccommits.druid.apache
https://security.openstack.org/ossa/OSSA-2020-004.html Vendor Advisory
https://usn.ubuntu.com/4480-1/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/05/06/5 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/05/07/2 Mailing ListThird Party Advisory
https://bugs.launchpad.net/keystone/+bug/1872733 PatchThird Party Advisory
https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa%40%3Ccommits.druid.apache
https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2%40%3Ccommits.druid.apache
https://security.openstack.org/ossa/OSSA-2020-004.html Vendor Advisory
https://usn.ubuntu.com/4480-1/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/05/06/5 Mailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-12691), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.