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Vulnerability record · CVE-2021-3563 · published 26 August 2022

CVE-2021-3563: Openstack keystone incorrect authorization vulnerability

Openstack · Keystone

A flaw was found in openstack-keystone. Only the first 72 characters of an application secret are verified allowing attackers bypass some password complexity which administrators may be counting on. The highest threat from this vulnerability is to data confidentiality and integrity.

7.4 CVSS 3.1 High EPSS 1.7% · top 23.1% CWE-863 · Incorrect authorization
7.4CVSS 3.1 base score
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References, 6 tagged exploit
17 Jun 2026Last modified by NVD

Description

A flaw was found in openstack-keystone. Only the first 72 characters of an application secret are verified allowing attackers bypass some password complexity which administrators may be counting on. The highest threat from this vulnerability is to data confidentiality and integrity.

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

Affected products

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

References

LinkTags
https://access.redhat.com/security/cve/CVE-2021-3563 Issue TrackingThird Party Advisory
https://bugs.launchpad.net/ossa/+bug/1901891 ExploitIssue TrackingThird Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1962908 ExploitIssue TrackingThird Party AdvisoryVendor Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00007.html
https://security-tracker.debian.org/tracker/CVE-2021-3563 ExploitIssue TrackingThird Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3563 Issue TrackingThird Party Advisory
https://bugs.launchpad.net/ossa/+bug/1901891 ExploitIssue TrackingThird Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1962908 ExploitIssue TrackingThird Party AdvisoryVendor Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00007.html
https://security-tracker.debian.org/tracker/CVE-2021-3563 ExploitIssue TrackingThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-3563), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.