CVE-2021-3563

Name: CVE-2021-3563
Creator: NVD / NIST
Published: 2022-08-26T16:15:08.867+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 1.27%

Last modified Jun 17, 2026

CVE-2021-3563 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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. EPSS estimates a 1.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.4/10

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

EPSS Probability

1.27%

66.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Openstack	Keystone	All versions
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0
Redhat	Openstack Platform	10.0
Redhat	Openstack Platform	13.0
Redhat	Openstack Platform	16.1
Redhat	Openstack Platform	16.2

References

https://access.redhat.com/security/cve/CVE-2021-3563Issue Tracking, Third Party Advisory
https://bugs.launchpad.net/ossa/+bug/1901891Exploit, Issue Tracking, Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1962908Exploit, Issue Tracking, Third Party Advisory, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00007.html
https://security-tracker.debian.org/tracker/CVE-2021-3563Exploit, Issue Tracking, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3563Issue Tracking, Third Party Advisory
https://bugs.launchpad.net/ossa/+bug/1901891Exploit, Issue Tracking, Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1962908Exploit, Issue Tracking, Third Party Advisory, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00007.html
https://security-tracker.debian.org/tracker/CVE-2021-3563Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Aug 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3563?

How severe is CVE-2021-3563?

CVE-2021-3563 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 1.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3563?

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-2021-3563?

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

Scan your code now

Source: NVD / NIST