Is this vulnerability remotely exploitable over the internet?

Yes, if the Sharp admin or content interface is exposed over the internet and an attacker can obtain authenticated access, they can exploit the upload endpoint remotely by modifying requests to bypass file type restrictions.

Does exploitation require administrative privileges?

Not necessarily. The vulnerability affects any authenticated user who can reach the vulnerable upload endpoint. The exact role required depends on how Sharp is configured and which users are allowed to upload files.

What is the safest general fix pattern?

The safest approach is to define all upload validation rules strictly on the server and ignore any client-supplied validation parameters. Additionally, store uploaded files on non-executable, private storage that is not directly web-accessible, and serve files through controlled download mechanisms.

Severity:

HIGH RISK

(8.8)

Unrestricted File Upload (CWE-434) in Sharp Laravel CMS ApiFormUploadController

CVE-2026-33687

Published:

Mar 26, 2026

Status:

Analyzed

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-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Unrestricted File Upload

CWE:

CWE-434

Impact:

Arbitrary File Upload with Potential Remote Code Execution

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Unrestricted File Upload

CWE:

CWE-434

Impact:

Arbitrary File Upload with Potential Remote Code Execution

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Unrestricted File Upload (CWE-434) in Sharp Laravel CMS ApiFormUploadController

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

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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