GHSA-7x74-h8cw-qhxq
NONEGHSA-7x74-h8cw-qhxq is a none-severity (CVSS 0) Information Exposure vulnerability in Umbraco.CMS. O3 Security confirms whether GHSA-7x74-h8cw-qhxq is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Brute force exploit can be used to collect valid usernames
Real-World Exposure
Umbraco.CMS.NETUmbraco.CMS.NETUmbraco.CMSReal-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
A brute force exploit that can be used to collect valid usernames is possible.
Explanation of the vulnerability
It's a brute force exploit that can be used to collect valid usernames by using the “forgot password” function when trying to log into the Backoffice. If the username/email is known, it is easier to find the corresponding password. If an email address that was already used and registered by a user, is provided as an input, the server internal processing time takes longer. If the email address does not exist in the database of the registered users, the server would respond immediately.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | Umbraco.CMS | ≥ 8.0.0&&< 8.18.10 | 8.18.10 |
| .NETNuGet | Umbraco.CMS | ≥ 9.0.0&&< 10.8.1 | 10.8.1 |
| .NETNuGet | Umbraco.CMS | ≥ 11.0.0&&< 12.3.4 | 12.3.4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Umbraco.CMS. 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 to 8.18.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7x74-h8cw-qhxq 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-7x74-h8cw-qhxq 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-7x74-h8cw-qhxq. 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-7x74-h8cw-qhxq in your dependencies?
O3 detects GHSA-7x74-h8cw-qhxq across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.