CVE-2023-28821
Missing rate limit for password resets
Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.
- Record
CVE-2023-28821- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:N - Weakness
- CWE-640
- Updated
- 2026-11-02
EUVDEUVD-2023-1366
Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.
- Record
EUVD-2023-1366- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-ph6g-6v8w-8p6m
Missing rate limit for password resets
Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.
- Record
GHSA-ph6g-6v8w-8p6m- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-640
- Updated
- 2026-11-02
NVD
Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.
- Record
CVE-2023-28821- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-640
- Updated
- 2026-11-02
OSV
Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.
- Record
CVE-2023-28821- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:N - Updated
- 2026-11-02
OSVGHSA-ph6g-6v8w-8p6m
Missing rate limit for password resets
Concrete CMS (previously concrete5) before 9.1 did not have a rate limit for password resets.
- Record
GHSA-ph6g-6v8w-8p6m- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-640
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
concrete5/concrete5Packagist |
before 9.1.0 | 9.1.0 |
concrete5/concrete5Packagist |
before 9.1.0, plus listed versions 8.08.0.18.0.28.0.38.1.0 Show 45 moreShow less8.2.08.2.0RC28.2.18.3.08.3.18.3.28.4.08.4.0RC38.4.0RC48.4.18.4.28.4.38.4.48.4.58.5.08.5.0RC18.5.0RC28.5.18.5.108.5.118.5.128.5.138.5.148.5.158.5.168.5.178.5.188.5.198.5.28.5.208.5.218.5.38.5.48.5.58.5.68.5.6RC18.5.78.5.88.5.99.0.09.0.0RC19.0.0RC39.0.0RC49.0.19.0.2 |
9.1.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-28821 is a medium vulnerability (CVSS 5.3) in Concretecms Concrete Cms, published April 28, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.73%, the 54th percentile. Fixed in concrete5/concrete5 9.1.0.