Is this vulnerability remotely exploitable?

Yes, if the upload functionality is reachable over the network (e.g., via the public web interface). An attacker who can access the upload feature can potentially achieve remote code execution by submitting crafted files.

Does an attacker need authenticated access to exploit this?

That depends on how the application is deployed. If the image upload endpoint requires login, the attacker needs at least a low-privileged account. If guest or self-registration users can upload images, the barrier to exploitation is significantly lower.

What is the safest general fix pattern for this issue?

The most robust pattern is to treat all uploads as untrusted data: strictly whitelist allowed file types, verify content signatures, and store uploads in non-executable locations outside the web root. Then serve them through a controlled mechanism that never interprets uploaded content as code.

Severity:

CRITICAL RISK

(9.8)

Unrestricted File Upload (CWE-434) Leading to Remote Code Execution in Covid-19 Contact Tracing System 1.0

CVE-2025-66802

Published:

Jan 12, 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-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Unrestricted File Upload

CWE:

CWE-434

Impact:

Remote Code Execution

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Unrestricted File Upload

CWE:

CWE-434

Impact:

Remote Code Execution

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

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) Leading to Remote Code Execution in Covid-19 Contact Tracing System 1.0

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

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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