SEPTEMBER 20, 2026
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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

This is a critical severity vulnerability with a CVSS score of 9.8. Public exploit code or proof-of-concept references have been detected in its references. Its EPSS score suggests a 59.5% probability of exploitation in the next 30 days.

Public Exploit Signal

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

GitHub PoC Links

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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)