CVE-2018-18325 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. This CVE ID resolves an incomplete patch for CVE-2018-15811.
From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.
Should You Worry?
- CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 3 Nov 2021.
- Rated High severity (CVSS 7.5, scored by CISA).
- It has been in the catalogue for 1,829 days. Systems still unpatched now have almost certainly been scanned for it.
What It Is
DNN (aka DotNetNuke) 9.2 through 9.2.2 uses a weak encryption algorithm to protect input parameters. NOTE: this issue exists because of an incomplete fix for CVE-2018-15811.
What To Do Now
- 1
Find it
Search your asset inventory and external attack surface for DotNetNuke (DNN). Include cloud images, appliances and anything a supplier runs for you.
Attack Surface Management - 2
- 3
Hunt for compromise
If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.
Incident Response - 4
Prove it is fixed
Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.
Penetration Testing
Vendor Advisories
The Compliance Clock
General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.
Not Sure If You Are Exposed?
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