How easily can this vulnerability be exploited?

Exploitation is straightforward once an attacker has valid credentials with page creation rights. They only need to craft content or a file that is saved as executable PHP and then access it via the browser to trigger code execution.

Does an attacker need administrative access to exploit this?

Not necessarily. Any role that can create or modify pages in a way that results in files being written to the pages directory can potentially be abused. The exact requirement depends on how roles and permissions are configured in the NanoCMS instance.

What is the safest general fix pattern?

The most robust pattern is to ensure that user-provided content is never stored or interpreted as executable code. Store page data as plain text or markup in non-executable storage (e.g., database or static templates), and disable PHP execution in directories used for user content.

Severity:

HIGH RISK

(8.8)

Arbitrary Code Injection via Authenticated File Upload (CWE-94) in NanoCMS 0.4

CVE-2022-50898

Published:

Jan 13, 2026

Status:

Modified

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:

Code Injection

CWE:

CWE-434

Impact:

Remote Code Execution

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Code Injection

CWE:

CWE-434

Impact:

Remote Code Execution

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Arbitrary Code Injection via Authenticated File Upload (CWE-94) in NanoCMS 0.4

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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