Is this vulnerability remotely exploitable?

Yes. If the upload endpoint is reachable over the network, an attacker can exploit the vulnerability remotely by sending crafted file upload requests.

Does an attacker need to be authenticated to exploit this?

It depends on how the application is configured. If the upload functionality is exposed without authentication or with weak access control, anonymous attackers may be able to exploit it. Restrictive authentication significantly raises the bar but does not remove the need for robust file validation.

What is the safest general fix pattern for this issue?

The most reliable fix pattern is to combine strict server-side access control on upload endpoints with an aggressive allowlist-based validation of file types and storage of uploads in non-executable, non-public directories. Additionally, ensure the web server cannot run or interpret files from upload locations.

Severity:

HIGH RISK

(7.3)

Unrestricted File Upload (CWE-434) in H-ui.admin preview.php Library Endpoint

CVE-2025-15426

Published:

Jan 1, 2026

Status:

Deferred

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-94

HIGH RISK

HIGH

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

Remote Code Execution by authenticated users via malicious file upload

May 10, 2026

CWE-94

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Remote Code Execution by Authenticated Users

May 10, 2026

Vulnerability Type

Category:

Unrestricted File Upload

CWE:

CWE-284;CWE-434

Impact:

Remote Code Execution and Server Compromise

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Unrestricted File Upload

CWE:

CWE-284;CWE-434

Impact:

Remote Code Execution and Server Compromise

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

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Unrestricted File Upload (CWE-434) in H-ui.admin preview.php Library Endpoint

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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