Arbitrary File Write Vulnerability in NodeBB Plugin Emoji by NodeBB
CVE-2021-47746

8.6HIGH

Key Information:

Vendor

Nodebb

Status
Nodebb Plugin Emoji
Vendor
CVE Published:
21 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47746?

The NodeBB Plugin Emoji version 3.2.1 is vulnerable to an arbitrary file write flaw that permits users with administrative privileges to exploit the emoji upload API. This can be achieved through specially crafted file upload requests, allowing attackers to perform directory traversal and overwrite critical system files by manipulating the file path parameter. Consequently, this vulnerability poses significant security risks to the server environment.

Affected Version(s)

NodeBB Plugin Emoji 3.2.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47746 - Proof of Concept

References

https://www.exploit-db.com/exploits/49813
exploit
https://nodebb.org/
product
https://github.com/NodeBB/nodebb-plugin-emoji
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

1F98D
.