---
id: "CVE-2018-15811"
kind: "vulnerability"
aliases: ["CVE-2018-15811"]
title: "DotNetNuke (DNN) DotNetNuke (DNN): DotNetNuke (DNN) Inadequate Encryption Strength Vulnerability"
severity: "high"
cvss: 7.5
epss: 0.76304
exploited: true
status: "open"
category: "runtime"
products: [{"name": "DotNetNuke (DNN) DotNetNuke (DNN)", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["asp.net", "dnn", "dotnetnuke", "exploited", "runtime", "windows"]
not_affected_if: ["default-config"]
published_at: "2019-07-03T17:15:10+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-15811", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2018-15811", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-15811", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# DotNetNuke (DNN) DotNetNuke (DNN): DotNetNuke (DNN) Inadequate Encryption Strength Vulnerability

DotNetNuke (DNN), a .NET web content management system, encrypts some input parameters with a weak algorithm. An attacker who can see or capture those encrypted values can recover or forge them, and CISA lists this flaw as actively exploited.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:DotNetNuke (DNN) DotNetNuke (DNN) affected ? fixed ?

## Fix

Apply the DotNetNuke update per vendor instructions; the specific fixed version is not stated in the sources.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-15811
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2018-15811
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2018-15811

## From the sources

DotNetNuke (DNN) contains an inadequate encryption strength vulnerability resulting from the use of a weak encryption algorithm to protect input parameters.

CISA required action: Apply updates per vendor instructions.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_