Umbraco CMS up to 15.4.1 unrestricted upload

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Umbraco CMS up to 15.4.1. This affects an unknown function. The manipulation results in unrestricted upload. This vulnerability is reported as CVE-2025-48953. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Umbraco CMS up to 15.4.1. Affected is an unknown code block. The manipulation with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Umbraco is an ASP.NET content management system (CMS). Starting in version 14.0.0 and prior to versions 15.4.2 and 16.0.0, it's possible to upload a file that doesn't adhere with the configured allowable file extensions via a manipulated API request. The issue is patched in versions 15.4.2 and 16.0.0. No known workarounds are available.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-48953 since 05/28/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1608.002 by the MITRE ATT&CK project.

Upgrading to version 15.4.2 or 16.0.0 eliminates this vulnerability. Applying the patch d920e93d1ee29dc3301697e444f53e8cd5db3cf9 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.5
CNA Vector (GitHub_M): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Unrestricted upload
CWE: CWE-434 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: CMS 15.4.2/16.0.0
Patch: d920e93d1ee29dc3301697e444f53e8cd5db3cf9

Timelineinfo

05/28/2025 🔍
06/03/2025 +6 days 🔍
06/03/2025 +0 days 🔍
06/03/2025 +0 days 🔍

Sourcesinfo

Advisory: GHSA-fr6r-p8hv-x3c4
Status: Confirmed

CVE: CVE-2025-48953 (🔍)
GCVE (CVE): GCVE-0-2025-48953
GCVE (VulDB): GCVE-100-311022

Entryinfo

Created: 06/03/2025 22:20
Changes: 06/03/2025 22:20 (67)
Complete: 🔍
Cache ID: 216::103

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