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CVE-2025-67288

An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file. NOTE: this is disputed by the Supplier because the responsi...

Published: Dec 22, 2025Updated: Jan 8, 2026 Sources: CVE List NVD GHSACWE-434
10.0CRITICAL
NVD MITRE
EPSS Score
0.5%
Top 60.9%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
No Fix Available

Description

Umbraco CMS has an arbitrary file upload vulnerability

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-434

Affected Products

Umbraco.CmsNuGetOSS Libraries
n/an/a
umbraco cmsumbraco
On-premCMS Plugin
Web & CMS Plugins / cms-core
nugetpackage-ecosystemOSS Libraries
umbracocommercialDKWeb & CMS Pluginsaka umbraco cms, umbraco forms, umbraco-cms

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques
Command and Control
Initial Access
Persistence
View detailed technique mapping

References

https://nvd.nist.gov/vuln/detail/CVE-2025-67288
nvd.nist.gov
https://github.com/github/advisory-database/pull/6633
github.com
https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation
docs.umbraco.com
and 3 more references View all →

Timeline

Published
Dec 22, 2025
Last Updated
Jan 8, 2026

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