How severe is CVE-2018-15811?

CVE-2018-15811 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2018-15811?

CVE-2018-15811 affects the following packages: DotNetNuke.Core (NuGet). Ecosystems affected: NuGet.

How do I fix CVE-2018-15811?

Update DotNetNuke.Core to version 9.2.2 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 CVE-2018-15811 actively exploited in the wild?

Yes. There are 4 known exploit references for CVE-2018-15811, including 1 documented proof-of-concept exploit on Exploit-DB and 3 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 CVE-2018-15811?

CVE-2018-15811 has an EPSS (Exploit Prediction Scoring System) score of 93.0%, 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 CVE-2018-15811 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2018-15811 (DotNetNuke (DNN) Inadequate Encryption Strength 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. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Is there exploit tooling available for CVE-2018-15811?

A Nuclei detection template exists for CVE-2018-15811, 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 CVE-2018-15811 published, and has it been updated?

CVE-2018-15811 was published on July 3, 2019 and was last updated on April 10, 2026. 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

.NET NuGet

CVE-2018-15811

HIGH

Inadequate Encryption Strength in DotNetNuke

Also known asGHSA-h595-8pw6-5q6v

Published

Jul 3, 2019

Updated

Apr 10, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

4 known

EPSS Exploitation Probability

via FIRST.org ↗

93.0%probability of exploitation in next 30 days

Very High Risk100th percentile-0.04%

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) 9.2 through 9.2.1 uses a weak encryption algorithm to protect input parameters.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`DotNetNuke.Core`	≥ 9.2.0&&< 9.2.2	9.2.2

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) 9.2 through 9.2.1 uses a weak encryption algorithm to protect input parameters.

O3 Security · Impact-Aware SCA

Is CVE-2018-15811 in your stack?

O3 detects CVE-2018-15811 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

CVSS Score

7.5/10

CVSS v3 base score

Vector breakdown

AV:Attack Vector

Network

AC:Attack Complexity

Low

PR:Privileges Required

None

UI:User Interaction

None

S:Scope

Unchanged

C:Confidentiality

High

I:Integrity

None

A:Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weaponization

OpenSSF Scorecard

Package health score

Dnn.Platform

7.6/10

Maintained10/10

Code-Review5/10

Dependency-Update-Tool10/10

Vulnerabilities3/10

Branch-Protection8/10

Assessed Jun 10, 2026

Timeline

Disclosed

Jul 3, 2019

First exploit

Apr 16, 2020

KEV added

Nov 3, 2021

Last updated

Apr 10, 2026

Identifiers

CVE-2018-15811

GHSA-h595-8pw6-5q6v

References

Advisorygithub.com Advisorydnnsoftware.com Webcisa.gov Evidencepacketstormsecurity.com

Data from OSV.dev, enriched by O3 Security. Refreshed hourly.