CVE-2019-25229Network attack vector

Authenticated arbitrary file upload via recorded filename changes

Published Dec 18, 2025 · Updated Dec 18, 2025

Unrestricted file upload in Kentico Xperience 12.0.29 and earlier allows remote authenticated users to store arbitrary file types. The MVC File uploader component accepts a changed recorded original filename on requests made after an initial upload, bypassing file-type restrictions. Access requires Read data permission for the Forms module; the vendor confirms unauthorized storage but does not report code execution.

CVSS severity8.7
High
EPSS probability0.34%
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 Kentico Xperience 12.0.29 and earlier allows remote authenticated users to store arbitrary file types. The MVC File uploader component accepts a changed recorded original filename on requests made after an initial upload, bypassing file-type restrictions. Access requires Read data permission for the Forms module; the vendor confirms unauthorized storage but does not report code execution.

The record

CVE
CVE-2019-25229
Published
Dec 18, 2025
Updated
Dec 18, 2025
Vendor
Kentico
Product
Kentico Xperience
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 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?

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

  1. Affected versionversion=0 <=12.0.29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kentico · Kentico Xperienceversion=0 <=12.0.29

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS: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 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.

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Technologies

Your stack

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Your stack

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