CVE-2025-47550Public exploitNetwork attack vector

Admin-level code execution via unchecked file upload

Published May 7, 2025 · Updated Apr 28, 2026

Arbitrary file upload in Themefic Instantio 3.3.16 and earlier allows remote authenticated users to execute PHP code on the server. The save_options() method in admin/tf-options/classes/Ins_TF_Settings.php trusts a client-declared application/octet-stream MIME type and moves the supplied filename into the web-accessible itinerary-fonts directory. Administrator access is required; a PHP web shell placed there runs commands with the web server's privileges.

CVSS severity6.6
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Themefic Instantio 3.3.16 and earlier allows remote authenticated users to execute PHP code on the server. The save_options() method in admin/tf-options/classes/Ins_TF_Settings.php trusts a client-declared application/octet-stream MIME type and moves the supplied filename into the web-accessible itinerary-fonts directory. Administrator access is required; a PHP web shell placed there runs commands with the web server's privileges.

The record

CVE
CVE-2025-47550
Published
May 7, 2025
Updated
Apr 28, 2026
Vendor
Themefic
Product
Instantio
Classifications
CWE-434, CAPEC-650, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

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=0 <=3.3.16 changes=[{"at":"3.3.17","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Themefic · Instantioversion=0 <=3.3.16 changes=[{"at":"3.3.17","status":"unaffected"}]

Published CVSS scores

6.6PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-650Upload a Web Shell to a Web Server
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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