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Case File

CVE-2021-23439

MEDIUM · CVSS 4.2 EPSS 0.89% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-09-05 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.2. It affects Java. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-23439
Severity
MEDIUM
CVSS
4.2
EPSS
0.89%
Java

Original NVD Description

This affects the package file-upload-with-preview before 4.2.0. A file containing malicious JavaScript code in the name can be uploaded (a user needs to be tricked into uploading such a file).