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MEDIUM severity

GHSA-wvpv-ffcv-r6cw

MEDIUM

GHSA-wvpv-ffcv-r6cw is a medium-severity (CVSS 5.1) CWE-288 vulnerability in HaemmerElectronics.SeppPenner.WindowsHello. O3 Security confirms whether GHSA-wvpv-ffcv-r6cw is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Internal NCryptDecrypt method could be used externally from WindowsHello library.

Also known asCVE-2020-11005
Published
Apr 14, 2020
Updated
Mar 13, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Mar 13, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
.NETHaemmerElectronics.SeppPenner.WindowsHello

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

Every user of the library before version 1.0.4.

Patches

Patched in 1.0.4+.

Workarounds

None.

References

https://github.com/SeppPenner/WindowsHello/issues/3

For more information

It this library is used to encrypt text and write the output to a txt file, another executable could be able to decrypt the text using the static method NCryptDecrypt from this same library without the need to use Windows Hello Authentication again.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetHaemmerElectronics.SeppPenner.WindowsHelloall versions1.0.4

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for HaemmerElectronics.SeppPenner.WindowsHello. 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.

  2. Fix

    Update HaemmerElectronics.SeppPenner.WindowsHello to 1.0.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wvpv-ffcv-r6cw 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.

  4. How O3 protects you

    O3 pinpoints whether GHSA-wvpv-ffcv-r6cw 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-wvpv-ffcv-r6cw. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Impact Every user of the library before version 1.0.4. ### Patches Patched in 1.0.4+. ### Workarounds None. ### References https://github.com/SeppPenner/WindowsHello/issues/3 ### For more information It this library is used to encrypt text and write the output to a txt file, another executable could be able to decrypt the text using the static method NCryptDecrypt from this same library without the need to use Windows Hello Authentication again.
O3 Security · Impact-Aware SCA

Is GHSA-wvpv-ffcv-r6cw in your dependencies?

O3 detects GHSA-wvpv-ffcv-r6cw across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.