Is CVE-2018-15811 in the CISA KEV catalog?

Yes. CVE-2018-15811 is on the CISA Known Exploited Vulnerabilities list, added 2021-11-03.

What is the CVSS severity of CVE-2018-15811?

CVE-2018-15811 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-15811?

CVE-2018-15811 has an EPSS score of 74.05% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2018-15811?

No published fix for CVE-2018-15811 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2022-05-03. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2018-15811

HIGHCISA KEVEPSS 99th pctl

7.5

CVSS v3

NVD

Description

DNN (aka DotNetNuke) 9.2 through 9.2.1 uses a weak encryption algorithm to protect input parameters.

CWE-326

How to fix

Actively exploited, no published fix found yet

CISA required action: Apply updates per vendor instructions.

Federal remediation due: 2022-05-03

Mitigation guidance may be in the linked vendor advisories in the References section below.

TridentStack Control tracks known vulnerabilities across your Windows, macOS, and Linux fleet and shows the fix as soon as one is published. See how it works

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

74.05%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

DotNetNuke (DNN) Inadequate Encryption Strength Vulnerability

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

Apply updates per vendor instructions.

Remediation due: 2022-05-03

References

Exploit1

packetstormsecurity.com

Vendor Advisory1

dnnsoftware.com

Government Resource1

cisa.gov

Release Notes1

github.com

Related Vulnerabilities

Other CWE-326 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0224	High	7.4	95%	-	Fix
CVE-2017-1000486	Critical	9.8	94%	KEV	Fix
CVE-2013-2566	Medium	5.9	84%	-	Fix
CVE-2017-11317	Critical	9.8	83%	KEV	-
CVE-2018-18325	High	7.5	74%	KEV	-
CVE-2011-3389	Medium	4.3	73%	-	Fix

Embed a live status badge for CVE-2018-15811

Markdown

[![CVE-2018-15811](https://tridentstack.com/cve/badge/CVE-2018-15811.svg)](https://tridentstack.com/cve/CVE-2018-15811)

HTML

<a href="https://tridentstack.com/cve/CVE-2018-15811"><img src="https://tridentstack.com/cve/badge/CVE-2018-15811.svg" alt="CVE-2018-15811"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-07.