CVE-2023-27246Public exploitNetwork attack vector

Authenticated code execution via crafted .htaccess upload

Published Mar 28, 2023 · Updated Feb 18, 2025

Unrestricted file upload in MK-Auth Virtual Disk 23.01K4.9 and earlier allows remote authenticated users to execute server code. The Virtual Disk accepts a crafted .htaccess file that directs Apache to run an otherwise permitted extension through the PHP interpreter. An ISP customer account with access to the enabled Virtual Disk feature is required, after which uploaded server-side content runs in the web server context.

CVSS severity8.8
High
EPSS probability0.80%
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 MK-Auth Virtual Disk 23.01K4.9 and earlier allows remote authenticated users to execute server code. The Virtual Disk accepts a crafted .htaccess file that directs Apache to run an otherwise permitted extension through the PHP interpreter. An ISP customer account with access to the enabled Virtual Disk feature is required, after which uploaded server-side content runs in the web server context.

The record

CVE
CVE-2023-27246
Published
Mar 28, 2023
Updated
Feb 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1190, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 2025Record 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

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application
T1505.003Web 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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