What is CVE-2016-20052?

CVE-2016-20052 is a critical-severity vulnerability in Snewscms Snews, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-04-04.

How severe is CVE-2016-20052?

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

Arbitrary file upload in Snewscms Snews

CVE-2016-20052

Snews CMS 1.7 contains an unrestricted file upload vulnerability that allows unauthenticated attackers to upload arbitrary files including PHP executables to the snews_files directory. Attackers can upload malicious PHP files through the multipart form-data upload endpoint and execute them by accessing the uploaded file path to achieve remote code execution.

Vulnerability class: Unrestricted File Upload

EPSS: 0.010 (57.7th 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

Snewscms Snews
Snewscms Snews Cms Upload Sheller — versions 1.7

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

disclosure@vulncheck.com (Exploit, VDB Entry, exploit)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2016-20052?: CVE-2016-20052 is a critical-severity vulnerability in Snewscms Snews, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-04-04.
How severe is CVE-2016-20052?: Critical severity. CVSS v3 base score is 9.8 out of 10.