CVE-2012-10054Public exploitNetwork attack vector

Unauthenticated code execution via traversable ASPX upload

Published Aug 13, 2025 · Updated May 15, 2026

Remote code execution in Umbraco CMS before 4.7.1 allows remote attackers to execute ASPX code through an unauthenticated SOAP request. The codeEditorSave.asmx SaveDLRScript operation accepts an unauthenticated fileName, fails to confine traversed paths, and writes supplied ASPX content beneath /umbraco/. Network access to the endpoint and server-side write permission are sufficient to place and run code in the IIS application context.

CVSS severity9.3
Critical
EPSS probability2.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Umbraco CMS before 4.7.1 allows remote attackers to execute ASPX code through an unauthenticated SOAP request. The codeEditorSave.asmx SaveDLRScript operation accepts an unauthenticated fileName, fails to confine traversed paths, and writes supplied ASPX content beneath /umbraco/. Network access to the endpoint and server-side write permission are sufficient to place and run code in the IIS application context.

The record

CVE
CVE-2012-10054
Published
Aug 13, 2025
Updated
May 15, 2026
Vendor
Umbraco
Product
Umbraco CMS
Classifications
CWE-434, CWE-22, CAPEC-242, CAPEC-126, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2025CVE publishedPublication date reported by the CVE source.
  2. May 15, 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 <4.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Umbraco · Umbraco CMSversion=0 <4.7.1

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.

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

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC-242Code Injection
CAPEC-126Path Traversal
T1190Exploit Public-Facing Application

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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