CVE-2023-28821

Name: CVE-2023-28821
Creator: NVD / NIST
Published: 2023-04-28T14:15:10.753+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2023-28821 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.73%

49.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Concretecms	Concrete Cms	< 9.1.0

References

https://github.com/concretecms/concretecms/releasesRelease Notes
https://www.concretecms.org/about/project-news/security/concrete-cms-security-advisory-2023-04-20Vendor Advisory
https://github.com/concretecms/concretecms/releasesRelease Notes
https://www.concretecms.org/about/project-news/security/concrete-cms-security-advisory-2023-04-20Vendor Advisory

Timeline

Published: Apr 28, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-28821?

Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.

How severe is CVE-2023-28821?

CVE-2023-28821 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28821?

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-2023-28821?

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

Scan your code now

Source: NVD / NIST