CVE-2018-15811 — DotNetNuke (DNN) Inadequate Encryption Strength Vulnerability

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

01What is this vulnerability?

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

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2021-11-03. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-07-03T16:23:27.000Z
• Last modified: 2025-10-21T23:45:34.330Z
• Added to CISA KEV: 2021-11-03
• BOD 22-01 due: 2022-05-03

09References

• github.com — https://github.com/dnnsoftware/Dnn.Platform/releases
• www.dnnsoftware.com — https://www.dnnsoftware.com/community/security/security-center
• packetstormsecurity.com — http://packetstormsecurity.com/files/157080/DotNetNuke-Cookie-Deserialization-Re…