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Case File

CVE-2021-42342

CRITICAL · CVSS 9.8 EPSS 59.46% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-14 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

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

GitHub PoC Links
github.com ↗

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

CVE
CVE-2021-42342
Severity
CRITICAL
CVSS
9.8
EPSS
59.46%

Original NVD Description

An issue was discovered in GoAhead 4.x and 5.x before 5.1.5. In the file upload filter, user form variables can be passed to CGI scripts without being prefixed with the CGI prefix. This permits tunneling untrusted environment variables into vulnerable CGI scripts.