Missing rate limit for password resets

MEDIUM 5.3CVE-2023-28821 · GHSA-ph6g-6v8w-8p6m · Published 28/04/2023 · updated 17/06/2026

In short

CVE-2023-28821 is a MEDIUM (CVSS 5.3) vulnerability affecting concrete5/concrete5, concrete cms (concretecms).
Chance of exploitation in the next 30 days (EPSS): 0.73%, higher than 54.2% of all vulnerabilities.
Fix: update to 9.1.0 or later.

Package	Affected versions	Patched versions
concrete5/concrete5 Packagist	`< 9.1.0`	`9.1.0`
concrete cms concretecms	`< 9.1.0`	`9.1.0`

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

NVD description

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

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

Packagist

< 9.1.0

9.1.0

< 9.1.0

9.1.0

More vulnerabilities in concrete5/concrete5

See all →