There is an information disclosure issue in DNN (formerly DotNetNuke) 9.5 within the built-in Activity-Feed/Messaging/Userid/ Message Cente…

published 2020-04-06 6y ago modified 2026-06-17 4mo ago also EUVD-2020-3935

cvss: 4.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits: 0; none known

There is an information disclosure issue in DNN (formerly DotNetNuke) 9.5 within the built-in Activity-Feed/Messaging/Userid/ Message Center module. A registered user is able to enumerate any file in the Admin File Manager (other than ones contained in a secure folder) by sending themselves a message with the file attached, e.g., by using an arbitrary small integer value in the fileIds parameter.

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Exploit prediction

0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

neff.blog https://neff.blog/2020/04/04/dotnetnuke-9-5-file-path-information-disclosure/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N

Classification

Weakness

CWE-330 Use of Insufficiently Random Values
CWE-639 Authorization Bypass Through User-Controlled Key

References

neff.blog /2020/04/04/dotnetnuke-9-5-file-path-information-disclosure/
exploit, third-party-advisory

Sources

CVE List CVE-2020-11585
NVD CVE-2020-11585

Fencer Intel 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.