Unauthenticated file upload via unchecked AJAX action
Published Feb 5, 2024 · Updated Jan 9, 2026
Arbitrary file upload in WP3DPrinting 3DPrint Lite before 1.9.1.5 allows remote attackers to write server files via an AJAX request. The p3dlite_handle_upload action performs neither authorization nor file-type validation before storing the submitted multipart file. No account is required; the bundled .htaccess blocks direct access to uploaded files on Apache servers, limiting straightforward code execution there.
Summary
What happened
Arbitrary file upload in WP3DPrinting 3DPrint Lite before 1.9.1.5 allows remote attackers to write server files via an AJAX request. The p3dlite_handle_upload action performs neither authorization nor file-type validation before storing the submitted multipart file. No account is required; the bundled .htaccess blocks direct access to uploaded files on Apache servers, limiting straightforward code execution there.
The record
- CVE
- CVE-2021-4436
- Published
- Feb 5, 2024
- Updated
- Jan 9, 2026
- Vendor
- WP3DPrinting
- Product
- 3DPrint Lite
- Classifications
- CWE-434, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 5, 2024CVE publishedPublication date reported by the CVE source.
- Jan 9, 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=0 <1.9.1.5
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
- 3DPrint Lite 1.9.1.4 arbitrary file upload exploitfunctional · demonstrated
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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