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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.010 (59.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Snewscms Snews
- Snewscms Snews Cms Upload Sheller — versions 1.7
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/40706 (Exploit, VDB Entry, exploit)
- www.vulncheck.com/advisories/snews-cms-unrestricted-file-upload-via-snews-files (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.