CVE-2020-12691

Name: CVE-2020-12691
Creator: NVD / NIST
Published: 2020-05-07T00:15:10.957+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 4.92%

Last modified Jun 17, 2026

CVE-2020-12691 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 4.92% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

4.92%

91.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Openstack	Keystone	< 15.0.1
Openstack	Keystone	16.0.0
Canonical	Ubuntu Linux	18.04

References

http://www.openwall.com/lists/oss-security/2020/05/07/2Mailing List, Third Party Advisory
https://bugs.launchpad.net/keystone/+bug/1872733Patch, Third Party Advisory
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.htmlVendor Advisory
https://usn.ubuntu.com/4480-1/Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/05/06/5Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/05/07/2Mailing List, Third Party Advisory
https://bugs.launchpad.net/keystone/+bug/1872733Patch, Third Party Advisory
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.htmlVendor Advisory
https://usn.ubuntu.com/4480-1/Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/05/06/5Mailing List, Third Party Advisory

Timeline

Published: May 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12691?

How severe is CVE-2020-12691?

CVE-2020-12691 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.92% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12691?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-12691?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST