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TI-2021-18771 Aliases CVE-2021-42342GHSA-xrrx-hrm6-mxr7

An issue was discovered in GoAhead 4.x and 5.x before 5.1.5.

Priority HIGH 76CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.

Summary

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.

Why it matters now

EPSS 0.5946 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:embedthis:goahead:*:*:*:*:*:*:*:*4.0.0 – 4.1.3; 5.0.0 to before 5.1.5VulnerableEmbedthis
  • cpe:2.3:a:embedthis:goahead:*:*:*:*:*:*:*:* Versions 4.0.0 – 4.1.3; 5.0.0 to before 5.1.5 Vulnerable ·Embedthis

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-42342
  2. 2026-10-03 Alias added: GHSA-xrrx-hrm6-mxr7

References

Advisory 1

  • TI-2017-12833 Embedthis GoAhead before 3.6.5 allows remote code execution if CGI is enabled and a CGI… KEVCVSS 3.1HIGH 8.1
  • TI-2019-03557 Use after free in EmbedThis CVSS 3.1CRITICAL 9.8
  • TI-2017-03674 A vulnerability in a custom-built GoAhead web server used on Foscam, Vstarcam, and… CVSS 3.0CRITICAL 9.8
  • TI-2019-03558 Infinite loop in EmbedThis CVSS 3.1HIGH 7.5
  • TI-2014-07892 EmbedThis GoAhead 3.0.0 through 3.4.1 does not properly handle path segments starting… CVSS 2.0HIGH 7.5
  • TI-2017-14680 EmbedThis GoAhead Webserver version 4.0.0 is vulnerable to a NULL pointer dereference in… CVSS 3.0CRITICAL 9.8
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences