GHSA-6ffg-mjg7-585x
MEDIUMUmbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
Umbraco.Cms.Api.Management.NETUmbraco.Cms.Api.ManagementReal-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
An improper API access control issue has been identified, allowing low-privilege, authenticated users to create and update data type information that should be restricted to users with access to the settings section.
Patches
Will be patched in 14.3.3 and 15.2.3.
Workarounds
None available.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | Umbraco.Cms.Api.Management | ≥ 15.0.0-rc1&&< 15.2.3 | 15.2.3 |
| .NETNuGet | Umbraco.Cms.Api.Management | all versions | 14.3.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Umbraco.Cms.Api.Management. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update Umbraco.Cms.Api.Management to 15.2.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6ffg-mjg7-585x is resolved across your whole dependency graph.
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.
How O3 protects you
O3 pinpoints whether GHSA-6ffg-mjg7-585x is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-6ffg-mjg7-585x. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-6ffg-mjg7-585x in your dependencies?
O3 detects GHSA-6ffg-mjg7-585x across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.