CVE-2023-33404Public exploitNetwork attack vector

Authenticated code execution via unrestricted video upload

Published Jun 26, 2023 · Updated Dec 3, 2024

Unrestricted file upload in BlogEngine.NET 3.3.8.0 and earlier allows remote authenticated users to execute code via the upload API. The UploadControlled.cs video path saves an attacker-supplied file to a hard-coded web-accessible directory without rejecting executable types. EditOwnPosts permission is required; requesting the uploaded file executes it on the server.

CVSS severity9.8
Critical
EPSS probability25.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in BlogEngine.NET 3.3.8.0 and earlier allows remote authenticated users to execute code via the upload API. The UploadControlled.cs video path saves an attacker-supplied file to a hard-coded web-accessible directory without rejecting executable types. EditOwnPosts permission is required; requesting the uploaded file executes it on the server.

The record

CVE
CVE-2023-33404
Published
Jun 26, 2023
Updated
Dec 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

Public exploit references

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

Technologies

Your stack

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Your stack

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