How severe is GHSA-3wcj-rg8q-9cqv?

GHSA-3wcj-rg8q-9cqv has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by GHSA-3wcj-rg8q-9cqv?

GHSA-3wcj-rg8q-9cqv affects the following packages: Microsoft.AspNetCore.All (NuGet), Microsoft.AspNetCore.Mvc.Core (NuGet). Ecosystems affected: NuGet.

How do I fix GHSA-3wcj-rg8q-9cqv?

Update Microsoft.AspNetCore.All to 2.0.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3wcj-rg8q-9cqv is resolved across your whole dependency graph.

How do I detect GHSA-3wcj-rg8q-9cqv in my NuGet dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.AspNetCore.All. 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.

How do I mitigate GHSA-3wcj-rg8q-9cqv if there is no patch (or I can't update yet)?

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 does O3 Security protect against GHSA-3wcj-rg8q-9cqv?

O3 pinpoints whether GHSA-3wcj-rg8q-9cqv is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-3wcj-rg8q-9cqv actively exploited in the wild?

No public exploit code has been indexed for GHSA-3wcj-rg8q-9cqv yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What type of vulnerability is GHSA-3wcj-rg8q-9cqv?

GHSA-3wcj-rg8q-9cqv is classified as Open Redirect (CWE-601). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-3wcj-rg8q-9cqv published, and has it been updated?

GHSA-3wcj-rg8q-9cqv was published on May 14, 2022 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

.NET NuGet

GHSA-3wcj-rg8q-9cqv

HIGH

GHSA-3wcj-rg8q-9cqv is a high-severity (CVSS 8.8) Open Redirect vulnerability in Microsoft.AspNetCore.All. O3 Security confirms whether GHSA-3wcj-rg8q-9cqv is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Open redirect in ASP.NET Core

Also known asCVE-2017-11879

Published

May 14, 2022

Updated

Nov 8, 2023

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Blast Radius

2 pkgs affected

.NETMicrosoft.AspNetCore.All.NETMicrosoft.AspNetCore.Mvc.Core

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

ASP.NET Core 2.0 allows an attacker to steal log-in session information such as cookies or authentication tokens via a specially crafted URL aka "ASP.NET Core Elevation Of Privilege Vulnerability".

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`Microsoft.AspNetCore.All`	≥ 2.0.0&&< 2.0.3	2.0.3
.NETNuGet	`Microsoft.AspNetCore.Mvc.Core`	≥ 2.0.0&&< 2.0.1	2.0.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.AspNetCore.All. 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 Microsoft.AspNetCore.All to 2.0.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3wcj-rg8q-9cqv 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-3wcj-rg8q-9cqv 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-3wcj-rg8q-9cqv. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

ASP.NET Core 2.0 allows an attacker to steal log-in session information such as cookies or authentication tokens via a specially crafted URL aka "ASP.NET Core Elevation Of Privilege Vulnerability".

O3 Security · Impact-Aware SCA

Is GHSA-3wcj-rg8q-9cqv in your dependencies?

O3 detects GHSA-3wcj-rg8q-9cqv across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works