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.NET
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MEDIUM severity

CVE-2024-43376 — Umbraco.Cms.Api.Management

MEDIUMFix: umbraco/Umbraco-CMS@b76070c

CVE-2024-43376 is a medium-severity (CVSS 4.3) CWE-209 vulnerability in Umbraco.Cms.Api.Management. A fix is available for Umbraco.Cms.Api.Management — see the affected versions and patch details below.

Umbraco CMS vulnerable to Generation of Error Message Containing Sensitive Information

Also known asGHSA-77gj-crhp-3gvx
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2024-43376.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs30th percentile — riskier than 30% of all scored CVEsHighest risk
0.00%0.33%0.66%0.99%0.5%0.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
.NETUmbraco.Cms.Api.Management

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

Impact

Some endpoints in the Management API can return stack trace information, even when Umbraco is not in debug mode.

Explanation of the vulnerability

Management API endpoints leaked stack traces in case of Internal server errors, no matter if the debug setting was disabled.

E.g. when paging with negative numbers in some apis

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetUmbraco.Cms.Api.Management≥ 14.0.0&&< 14.1.214.1.2dotnet add package Umbraco.Cms.Api.Management --version 14.1.2

Affected Products

1 product · 1 configurations
Application
umbraco cmsumbraco
≥ 14.0.0 && < 14.1.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Umbraco.Cms.Api.Management, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update Umbraco.Cms.Api.Management to 14.1.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-43376 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Impact Some endpoints in the Management API can return stack trace information, even when Umbraco is not in debug mode. ### Explanation of the vulnerability Management API endpoints leaked stack traces in case of Internal server errors, no matter if the debug setting was disabled. E.g. when paging with negative numbers in some apis
O3 Security · Impact-Aware SCA

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CVE-2024-43376: Umbraco.Cms.Api — Fixed in 14.1.2