How severe is GHSA-x2rg-fmcv-crq5?

GHSA-x2rg-fmcv-crq5 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by GHSA-x2rg-fmcv-crq5?

GHSA-x2rg-fmcv-crq5 affects the following packages: DotNetNuke.Core (NuGet). Ecosystems affected: NuGet.

How do I fix GHSA-x2rg-fmcv-crq5?

Update DotNetNuke.Core to version 9.1.1 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is GHSA-x2rg-fmcv-crq5 actively exploited in the wild?

Yes. There are 8 known exploit references for GHSA-x2rg-fmcv-crq5, including 1 documented proof-of-concept exploit on Exploit-DB and 5 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-x2rg-fmcv-crq5?

GHSA-x2rg-fmcv-crq5 has an EPSS (Exploit Prediction Scoring System) score of 94.3%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is GHSA-x2rg-fmcv-crq5 in the CISA Known Exploited Vulnerabilities catalog?

Yes. GHSA-x2rg-fmcv-crq5 (DotNetNuke (DNN) Remote Code Execution Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-05-03. The required action was: Apply updates per vendor instructions. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is GHSA-x2rg-fmcv-crq5?

GHSA-x2rg-fmcv-crq5 is classified as Code Injection (CWE-94). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Is there exploit tooling available for GHSA-x2rg-fmcv-crq5?

A Nuclei detection template exists for GHSA-x2rg-fmcv-crq5, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was GHSA-x2rg-fmcv-crq5 published, and has it been updated?

GHSA-x2rg-fmcv-crq5 was published on October 16, 2018 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.

CISA KEV·Added 2021-11-03 — agencies required to remediate by 2022-05-03 · Ransomware

.NET NuGet

GHSA-x2rg-fmcv-crq5

HIGH

DNN (aka DotNetNuke) has Remote Code Execution via a cookie

Also known asCVE-2017-9822

Published

Oct 16, 2018

Updated

Nov 8, 2023

Affected

1 pkg

Patched

1 / 1

Exploits

8 known

EPSS Exploitation Probability

via FIRST.org ↗

94.3%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

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

1 pkg affected

.NETDotNetNuke.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

DNN (aka DotNetNuke) before 9.1.1 has Remote Code Execution via a cookie, aka "2017-08 (Critical) Possible remote code execution on DNN sites."

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`DotNetNuke.Core`	all versions	9.1.1

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-48336remotewindows✓ Verified

DotNetNuke - Cookie Deserialization Remote Code Execution (Metasploit)

by Metasploit · Apr 16, 2020

Exploit-DB Source

Frequently Asked Questions

DNN (aka DotNetNuke) before 9.1.1 has Remote Code Execution via a cookie, aka "2017-08 (Critical) Possible remote code execution on DNN sites."

O3 Security · Impact-Aware SCA

Is GHSA-x2rg-fmcv-crq5 in your stack?

O3 detects GHSA-x2rg-fmcv-crq5 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 stack How O3 SCA works