CVE-2016-20052

CRITICAL

Snews CMS 1.7 Unrestricted File Upload via snews_files

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2016-20052. PoCs published by Amir.ght.

AI-analyzed exploit summary This exploit demonstrates an arbitrary file upload vulnerability in Snews CMS 1.7, allowing an attacker to upload a malicious PHP file (shell.php) without proper file extension restrictions. The PoC includes a crafted multipart/form-data request to bypass upload filters and achieve remote code execution.

Description

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Amir.ght · textwebappsphp
https://www.exploit-db.com/exploits/40706

This exploit demonstrates an arbitrary file upload vulnerability in Snews CMS 1.7, allowing an attacker to upload a malicious PHP file (shell.php) without proper file extension restrictions. The PoC includes a crafted multipart/form-data request to bypass upload filters and achieve remote code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Snews CMS 1.7
Auth required
Prerequisites: admin access to the upload functionality
devstral-2 · analyzed Apr 07, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit exploit
ExploitDB-40706
https://www.exploit-db.com/exploits/40706
Third Party Advisory third-party-advisory
VulnCheck Advisory: Snews CMS 1.7 Unrestricted File Upload via snews_files
https://www.vulncheck.com/advisories/snews-cms-unrestricted-file-upload-via-snews-files

Scores

CVSS v3 9.8
EPSS 0.0046
EPSS Percentile 64.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-434
Status published
Products (2)
snewscms/snews < 1.7
Snewscms/Snews CMS upload sheller 1.7
Published Apr 04, 2026
Tracked Since Apr 04, 2026