DNN File Upload Vulnerability

published 2020-02-24 6 y ago modified 2026-06-17 4 mo ago also GHSA-vjcm-j85r-7p68 , EUVD-2022-5367

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits: 0; none known

DNN (formerly DotNetNuke) through 9.4.4 has Insecure Permissions.

Exploit prediction

1.85% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

packetstormsecurity.com http://packetstormsecurity.com/files/156484/DotNetNuke-CMS-9.5.0-File-Extension-Check-Bypass.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:N/I:P/A:N
GitHub	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
nuget	DotNetNuke.Core	<=9.4.4	no fix listed

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-669 Incorrect Resource Transfer Between Spheres

References

packetstormsecurity.com /files/156484/DotNetNuke-CMS-9.5.0-File-Extension-Check-Bypass.html
web, exploit, third-party-advisory, vdb-entry
github.com /dnnsoftware/Dnn.Platform/releases
web, release-notes, third-party-advisory
medium.com /%40SajjadPourali/dnn-dotnetnuke-cms-not-as-secure-as-you-think-e8516f789175
nvd.nist.gov /vuln/detail/CVE-2020-5188
advisory
github.com /dnnsoftware/Dnn.Platform
package
medium.com /@SajjadPourali/dnn-dotnetnuke-cms-not-as-secure-as-you-think-e8516f789175
web

Sources

CVE List CVE-2020-5188
GitHub Advisory GHSA-vjcm-j85r-7p68
NVD CVE-2020-5188

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary