What is CVE-2025-65899?

CVE-2025-65899 is a medium-severity vulnerability in Difuse Kalmia, classified under Observable Response Discrepancy. CVSS score: 5.3/10. Published 2025-12-04.

How severe is CVE-2025-65899?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2025-65899 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Difuse Kalmia

CVE-2025-65899

Kalmia CMS version 0.2.0 contains a user enumeration vulnerability in its authentication mechanism. The application returns different error messages for invalid users (user_not_found) versus valid users with incorrect passwords (invalid_password). This observable response discrepancy allows unauthenticated attackers to enumerate valid usernames on the system.

EPSS: 0.003 (24.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Difuse Kalmia — versions 0.2.0
N/a — versions n/a

Weakness classification (CWE)

CWE-204 — Observable Response Discrepancy

Public proof-of-concept exploits

Noxurge/CVE-2025-65899

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-65899?: CVE-2025-65899 is a medium-severity vulnerability in Difuse Kalmia, classified under Observable Response Discrepancy. CVSS score: 5.3/10. Published 2025-12-04.
How severe is CVE-2025-65899?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2025-65899 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.