Administrator code execution via unrestricted PHP upload
Published Oct 16, 2023 · Updated Apr 23, 2025
Arbitrary file upload in Ninja Team Filester before 1.8.1 allows remote authenticated users with administrator access to execute code. The File Manager UI accepts and stores executable PHP files without enforcing upload restrictions that should constrain multisite administrators. An administrator account and a multisite environment that otherwise limits server control are required; a placed PHP file runs commands as the web server.
Summary
What happened
Arbitrary file upload in Ninja Team Filester before 1.8.1 allows remote authenticated users with administrator access to execute code. The File Manager UI accepts and stores executable PHP files without enforcing upload restrictions that should constrain multisite administrators. An administrator account and a multisite environment that otherwise limits server control are required; a placed PHP file runs commands as the web server.
The record
- CVE
- CVE-2023-4861
- Published
- Oct 16, 2023
- Updated
- Apr 23, 2025
- Vendor
- Ninja Team
- Product
- Filester
- Classifications
- CWE-94, T1505.003
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Oct 16, 2023CVE publishedPublication date reported by the CVE source.
- Apr 23, 2025Record 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=0 <1.8.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- WPScan administrator PHP web-shell proof of conceptproof of concept · validated
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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