What is CVE-2021-42342?

CVE-2021-42342 is a critical-severity vulnerability in Embedthis Goahead, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-10-14.

How severe is CVE-2021-42342?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-42342 known to be exploited?

24 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Embedthis Goahead

CVE-2021-42342

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 int…

Vulnerability class: Unrestricted File Upload

EPSS: 0.595 (99.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Embedthis Goahead
N/a — versions n/a

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-42342?: CVE-2021-42342 is a critical-severity vulnerability in Embedthis Goahead, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-10-14.
How severe is CVE-2021-42342?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-42342 known to be exploited?: 24 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.