How broadly exploitable is this vulnerability?

The issue is broadly exploitable in typical internet-facing deployments because it does not require authentication. Any remote user who can reach the careers/job application endpoint can attempt to upload a malicious file.

Does an attacker need valid credentials or internal network access?

No. Based on the described behavior, no valid credentials are required; the attack can be carried out by an unauthenticated user over the public network, as long as they can access the application's upload endpoint.

What is the safest general fix pattern?

The safest pattern is to require authentication for sensitive operations like file uploads, move all uploaded files into non-executable directories, and apply strict allowlist-based file-type validation. Additionally, ensure the web server never executes code from directories intended for untrusted content.

Severity:

CRITICAL RISK

(9.8)

Missing Authentication (CWE-306) Leading to Remote Code Execution in OpenCATS Resume Uploads

CVE-2021-47936

Published:

May 10, 2026

Status:

Received

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:

Authentication and Access Control Failure

CWE:

CWE-306

Impact:

Remote Code Execution by Unauthenticated Attackers

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Authentication and Access Control Failure

CWE:

CWE-306

Impact:

Remote Code Execution by Unauthenticated Attackers

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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From first line of code to a pentest
that knows every line of it.

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Missing Authentication (CWE-306) Leading to Remote Code Execution in OpenCATS Resume Uploads

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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