Is this vulnerability remotely exploitable?

Yes, but only through authenticated administrative interfaces. An attacker must be able to send requests to the NodeBB emoji upload API and possess admin-level credentials to exploit it.

What level of access is required to exploit this issue?

Exploitation requires administrative access within NodeBB. A lower-privileged or unauthenticated user would not typically be able to reach or invoke the vulnerable upload behavior with sufficient control.

What is the safest general fix pattern?

The safest approach is to eliminate user control over filesystem paths used for writes. Constrain all uploads to a dedicated directory, generate or sanitize filenames on the server, and verify via canonicalization that the resulting path is within the intended directory before writing.

Severity:

HIGH RISK

(7.5)

Arbitrary File Write via Path Traversal (CWE-73) in NodeBB Emoji Plugin

CVE-2021-47746

Published:

Jan 21, 2026

Status:

Awaiting Analysis

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:

Arbitrary File Write / Path Traversal in File Operations

CWE:

CWE-73

Impact:

Arbitrary File Write and Potential Application Compromise

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Arbitrary File Write / Path Traversal in File Operations

CWE:

CWE-73

Impact:

Arbitrary File Write and Potential Application Compromise

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Arbitrary File Write via Path Traversal (CWE-73) in NodeBB Emoji Plugin

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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