Remote code execution via unrestricted PHP upload
Published Apr 4, 2026 · Updated Apr 4, 2026
Unrestricted file upload in sNews CMS 1.7 allows remote attackers to execute PHP code through a crafted multipart request. The snews_files handler accepts an imagefile named with a .php extension and places it at a web-accessible path without blocking executable types. The CNA describes unauthenticated access, but its referenced proof of concept includes a session cookie and states that administrator access is required; successful upload executes code as the web-server account.
Summary
What happened
Unrestricted file upload in sNews CMS 1.7 allows remote attackers to execute PHP code through a crafted multipart request. The snews_files handler accepts an imagefile named with a .php extension and places it at a web-accessible path without blocking executable types. The CNA describes unauthenticated access, but its referenced proof of concept includes a session cookie and states that administrator access is required; successful upload executes code as the web-server account.
The record
- CVE
- CVE-2016-20052
- Published
- Apr 4, 2026
- Updated
- Apr 4, 2026
- Vendor
- sNews Team
- Product
- sNews
- Classifications
- CWE-434, CAPEC-1, T1505.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 4, 2026CVE publishedPublication date reported by the CVE source.
- Apr 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.7
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- sNews 1.7.1 Arbitrary File Uploadproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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