CVE-2025-64095Known exploitationNetwork attack vector

Unauthenticated file overwrite via exposed upload endpoint

Published Oct 28, 2025 · Updated Oct 28, 2025

Unrestricted file upload in DNN Platform before 10.1.1 allows remote attackers to overwrite site files through the default HTML editor. The FileUploader.ashx endpoint accepts anonymous uploads and fails to reject a filename that already exists, replacing the stored file. No account or user interaction is required; overwriting images enables site defacement, while script upload can inject XSS payloads when combined with another issue.

CVSS severity10.0
Critical
EPSS probability44.66%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in DNN Platform before 10.1.1 allows remote attackers to overwrite site files through the default HTML editor. The FileUploader.ashx endpoint accepts anonymous uploads and fails to reject a filename that already exists, replacing the stored file. No account or user interaction is required; overwriting images enables site defacement, while script upload can inject XSS payloads when combined with another issue.

The record

CVE
CVE-2025-64095
Published
Oct 28, 2025
Updated
Oct 28, 2025
Vendor
DNN Software
Product
DNN Platform
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 2025Record updatedLatest update available in the CVE record.
  3. Nov 27, 2025Exploitation reportedCrowdSec network observed exploitation attempts

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DNN Software · DNN Platformversion=< 10.1.1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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