How severe is CVE-2021-28399?

CVE-2021-28399 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-28399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28399?

CVE-2021-28399 affects Orangehrm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28399?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-28399 published?

CVE-2021-28399 was published on 2021-04-26 and last updated on 2026-06-17.

CVE-2021-28399

CVE-2021-28399 is a medium-severity vulnerability in Orangehrm with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Orangehrm
Published: 2021-04-26
Last modified: 2026-06-17

Description

OrangeHRM 4.7 allows an unauthenticated user to enumerate the valid username and email address via the forgot password function.

Frequently asked questions

What is CVE-2021-28399?: OrangeHRM 4.7 allows an unauthenticated user to enumerate the valid username and email address via the forgot password function.
How severe is CVE-2021-28399?: CVE-2021-28399 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-28399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28399?: CVE-2021-28399 affects Orangehrm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28399?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28399 published?: CVE-2021-28399 was published on 2021-04-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:orangehrm:orangehrm:4.7:*:*:*:*:*:*:*

More vulnerabilities in Orangehrm

CVE-2007-1193 — Critical (CVSS 9.3): Multiple unspecified vulnerabilities in the Login page in OrangeHRM before 20070212 have unknown impact and attack…
CVE-2025-66289 — High (CVSS 8.8): OrangeHRM is a comprehensive human resource management (HRM) system. From version 5.0 to 5.7, the application does not…
CVE-2025-66225 — High (CVSS 8.8): OrangeHRM is a comprehensive human resource management (HRM) system. From version 5.0 to 5.7, the password reset…
CVE-2025-66224 — High (CVSS 8.8): OrangeHRM is a comprehensive human resource management (HRM) system. From version 5.0 to 5.7, the application contains…
CVE-2019-12839 — High (CVSS 8.8): In OrangeHRM 4.3.1 and before, there is an input validation error within admin/listMailConfiguration (txtSendmailPath…
CVE-2024-36428 — High (CVSS 8.1): OrangeHRM 3.3.3 allows admin/viewProjects sortOrder SQL injection.

All CVEs affecting Orangehrm →