What is CVE-2024-43377?

CVE-2024-43377 is a medium-severity vulnerability in Umbraco Umbraco-Cms, classified under Improper Access Control. CVSS score: 5.4/10. Published 2024-08-20.

How severe is CVE-2024-43377?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Umbraco Umbraco-Cms

CVE-2024-43377

Umbraco CMS is an ASP.NET CMS. An authenticated user can access a few unintended endpoints. This issue is fixed in 14.1.2.

Published 2024-08-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (15.7th percentile), scored 2026-11-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Umbraco Umbraco-Cms — versions >= 14.0.0, < 14.1.2
Umbraco Cms

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-hrww-x3fq-xcvh (Vendor Advisory)
github.com/umbraco/Umbraco-CMS/commit/72bef8861d94a39d5cc9530a04c4797b91fcbecf (Patch)

Frequently asked questions

What is CVE-2024-43377?: CVE-2024-43377 is a medium-severity vulnerability in Umbraco Umbraco-Cms, classified under Improper Access Control. CVSS score: 5.4/10. Published 2024-08-20.
How severe is CVE-2024-43377?: Medium severity. CVSS v3 base score is 5.4 out of 10.