Kunstmaan Media Bundle up to 7.3.1 File FileHandler.php FileHandler::getFilePath unrestricted upload

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.41

Summaryinfo

A vulnerability classified as critical has been found in Kunstmaan Media Bundle up to 7.3.1. The impacted element is the function FileHandler::getFilePath of the file src/Kunstmaan/MediaBundle/Helper/File/FileHandler.php of the component File Handler. This manipulation causes unrestricted upload. The identification of this vulnerability is CVE-2026-104890. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Kunstmaan Media Bundle up to 7.3.1. It has been declared as critical. Affected by this vulnerability is the function FileHandler::getFilePath of the file src/Kunstmaan/MediaBundle/Helper/File/FileHandler.php of the component File Handler. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Kunstmaan CMS is an open source content management system based on the Symfony framework. Prior to 7.3.2, src/Kunstmaan/MediaBundle/Helper/File/FileHandler.php performs the blacklisted_extensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An authenticated backend user with media access can upload a mixed-case executable extension such as PHP that bypasses the check and is stored in the web-accessible media directory with an executable lowercase extension. The default blacklist also omits several server-executable extension types, allowing the same code-execution impact where the web server executes uploaded files. This issue is fixed in version 7.3.2.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-104890 since 10/02/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

By approaching the search of inurl:src/Kunstmaan/MediaBundle/Helper/File/FileHandler.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 7.3.2 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.2
CNA Vector (GitHub_M): 🔒

CVSSv2info

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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
Google Hack: 🔒
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: Media Bundle 7.3.2

Timelineinfo

10/02/2026 CVE reserved
10/05/2026 +3 days Advisory disclosed
10/05/2026 +0 days VulDB entry created
10/05/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-104890 (🔒)
GCVE (CVE): GCVE-0-2026-104890
GCVE (VulDB): GCVE-100-413629

Entryinfo

Created: 10/05/2026 18:09
Changes: 10/05/2026 18:09 (66)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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