Weakness (CWE)
CWE-434: Unrestricted Upload of File with Dangerous Type
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
How to prevent it (8 mitigations)
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Architecture and Design
Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.[REF-422] [REF-423]
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Architecture and Design
When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
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Architecture and Design
Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically. [REF-423]
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Implementation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
For example, limiting filenames to alphanumeric characters can help to restrict the introduction of unintended file extensions.
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Architecture and Design
Define a very limited set of allowable extensions and only generate filenames that end in these extensions. Consider the possibility of XSS (CWE-79) before allowing .html or .htm file types.
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Implementation
Ensure that only one extension is used in the filename. Some web servers, including some versions of Apache, may process files based on inner extensions so that "filename.php.gif" is fed to the PHP interpreter.[REF-422] [REF-423]
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Implementation
When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.
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Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Source: MITRE CWE-434
3,436 results · Feed
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Critical 9.8
File upload vulnerability in Omnispace Agora Project before 25.10 allowing attackers to execute code through the MSL en…
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Critical 9.8
VIAVIWEB Wallpaper Admin 1.0 - Code Execution via Image Upload
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High 7.2
e107 CMS v3.2.1 - Upload Restriction Bypass with Path Traversal File Override
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High 8.8
WBCE CMS 1.5.2 - Remote Code Execution (RCE) (Authenticated)
WBCE CMS version 1.5.2 contains an authenticated remote code execution vulnerability that allows attackers to upload malicious droplets through the admin panel. Authenticated attackers can exploit the droplet upload functionality in the admin tools to create …
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High 7.2
e107 CMS v3.2.1 - Upload restriction bypass (Authenticated [Admin])+ Server file override
e107 CMS version 3.2.1 contains a file upload vulnerability that allows authenticated administrators to override server files through the Media Manager import functionality. Attackers can exploit the upload mechanism by manipulating the upload URL parameter t…
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Critical 9.8
ImpressCMS 1.4.4 - Unrestricted File Upload
ImpressCMS 1.4.4 contains a file upload vulnerability with weak extension sanitization that allows attackers to upload potentially malicious files. Attackers can bypass file upload restrictions by using alternative file extensions .php2.php6.php7.phps.pht to …
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High 7.2
e107 CMS v3.2.1 - Admin Upload Restriction Bypass + RCE
e107 CMS version 3.2.1 contains a file upload vulnerability that allows authenticated administrative users to bypass upload restrictions and execute PHP files. Attackers can upload malicious PHP files to parent directories by manipulating the upload URL param…
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High 8.8
NanoCMS 0.4 - Remote Code Execution (RCE) (Authenticated)
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High 7.2
Authenticated Arbitrary File Upload Vulnerability in AOS-10 or AOS-8 Web-Based Management Interface
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Medium 5.3
Pega Customer Service Framework versions 8.7.0 through 25.1.0 are affected by a Unrestricted file upload vulnerability, where a privileged user could potentially upload a malicious file.
Pega Customer Service Framework versions 8.7.0 through 25.1.0 are affected by a Unrestricted file upload vulnerability, where a privileged user could potentially upload a malicious file.
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Medium 6.6
Multiple vulnerabilities in SAP Fiori App (Intercompany Balance Reconciliation)
SAP Fiori App Intercompany Balance Reconciliation allows an attacker with high privileges to upload any file (including script files) without proper file format validation. This has low impact on confidentiality, integrity and availability of the application.
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Critical 9.8
An arbitrary file upload vulnerability in the /utils/uploadFile component of Hubert Imoveis e Administracao Ltda Hub v2…
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Critical 9.3
emlog Arbitrary File Upload Vulnerability
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Medium 5.4
WebErpMesv2 has a File Upload Validation Bypass Leading to RCE
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High 7.3
Gin-vue-admin has arbitrary file upload vulnerability caused by path traversal
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Critical 9.6
Iris Allows Arbitrary File Deletion via Mass Assignment in Datastore File Management
Iris is a web collaborative platform that helps incident responders share technical details during investigations. Prior to 2.4.24, the DFIR-IRIS datastore file management system has a vulnerability where mass assignment of the file_local_name field combined …
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Critical 9.8CVE-2025-66802 Public exploit
Sourcecodester Covid-19 Contact Tracing System 1.0 is vulnerable to RCE (Remote Code Execution). The application receiv…
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High 8.8
An issue in Automai Director v.25.2.0 allows a remote attacker to execute arbitrary code via the update mechanism
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High 7.3CVE-2025-15503 Scanner template
Sangfor Operation and Maintenance Management System common.jsp unrestricted upload
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Medium 4.7CVE-2025-15495 Public exploit
BiggiDroid Simple PHP CMS editsite.php unrestricted upload
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High 7.3CVE-2026-22241 Public exploit
Open eClass has Unrestricted File Upload that Leads to Remote Code Execution (RCE)
The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, an arbitrary file upload vulnerability in the theme import functionality enables an attacker with administrative privileges to upload arbit…
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Critical 9.9
WordPress Corpkit theme <= 2.0 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in zozothemes Corpkit corpkit allows Upload a Web Shell to a Web Server.This issue affects Corpkit: from n/a through <= 2.0.
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Critical 9.1
WordPress Contentstudio plugin <= 1.3.7 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in contentstudio Contentstudio contentstudio allows Upload a Web Shell to a Web Server.This issue affects Contentstudio: from n/a through <= 1.3.7.
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Critical 9.8
WP Cost Estimation <= 9.642 - Missing Authorization to Arbitrary File Upload/Delete
The WP Cost Estimation plugin for WordPress is vulnerable to arbitrary file uploads and deletion due to missing file type validation in the lfb_upload_form and lfb_removeFile AJAX actions in versions up to, and including, 9.642. This makes it possible for una…
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Critical 10.0
n8n is vulnerable to Remote Code Execution via Arbitrary File Write
n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instan…
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Critical 9.8CVE-2025-67325 Public exploit
Unrestricted file upload in the hotel review feature in QloApps versions 1.7.0 and earlier allows remote unauthenticate…
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High 8.8
WP Enable WebP <= 1.0 - Authenticated (Author+) Arbitrary File Upload
The WP Enable WebP plugin for WordPress is vulnerable to arbitrary file uploads due to improper file type validation in the 'wpse_file_and_ext_webp' function in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with A…
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Medium 6.1
Drag and Drop Multiple File Upload – Contact Form 7 <= 1.3.9.2 - Unauthenticated Limited Arbitrary File Upload
The Drag and Drop Multiple File Upload – Contact Form 7 plugin for WordPress is vulnerable to limited upload of files with a dangerous type in all versions up to, and including, 1.3.9.2. This is due to the plugin not blocking .phar and .svg files. This makes …
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Medium 6.8CVE-2025-66837 Public exploit
A file upload vulnerability in ARIS 10.0.23.0.3587512 allows attackers to execute arbitrary code via uploading a crafte…
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High 7.3
projectworlds House Rental and Property Listing Signup register.php unrestricted upload
A flaw has been found in projectworlds House Rental and Property Listing 1.0. Impacted is an unknown function of the file /app/register.php?action=reg of the component Signup. This manipulation of the argument image causes unrestricted upload. Remote exploita…
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Critical 9.9
Arbitrary File Upload Vulnerability in WordPress themes by Themify
Unrestricted Upload of File with Dangerous Type vulnerability in Themify Themify Sidepane WordPress Theme, Themify Themify Newsy, Themify Themify Folo, Themify Themify Edmin, Themify Bloggie, Themify Photobox, Themify Wigi, Themify Rezo, Themify Slide allows …
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Critical 9.1
WordPress Media File Renamer plugin <= 5.7.7 - Arbitrary File Rename lead to RCE vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Meow Apps Media File Renamer allows Using Malicious Files.This issue affects Media File Renamer: from n/a through 5.7.7.
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Critical 9.9
WordPress Shopo <= 1.1.4 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Themify Shopo allows Upload a Web Shell to a Web Server.This issue affects Shopo: from n/a through 1.1.4.
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High 8.8
Quanta Computer｜QOCA aim AI Medical Cloud Platform - Arbitrary File Upload
QOCA aim AI Medical Cloud Platform developed by Quanta Computer has an Arbitrary File Upload vulnerability, allowing authenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
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Medium 6.3
cld378632668 JavaMall MinioController.java upload unrestricted upload
A vulnerability was found in cld378632668 JavaMall up to 994f1e2b019378ec9444cdf3fce2d5b5f72d28f0. This impacts the function Upload of the file src/main/java/com/macro/mall/controller/MinioController.java. The manipulation results in unrestricted upload. It i…
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Medium 6.3
code-projects Online Product Reservation System prod.php unrestricted upload
A flaw has been found in code-projects Online Product Reservation System 1.0. Affected by this vulnerability is an unknown functionality of the file /handgunner-administrator/prod.php. Executing a manipulation can lead to unrestricted upload. It is possible t…
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Medium 4.7
code-projects Content Management System edit_posts.php unrestricted upload
A security vulnerability has been detected in code-projects Content Management System 1.0. Impacted is an unknown function of the file /admin/edit_posts.php. The manipulation of the argument image leads to unrestricted upload. The attack is possible to be car…
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Medium 6.3
PHPGurukul Online Course Registration Student Registration edit-student-profile.php unrestricted upload
A vulnerability was found in PHPGurukul Online Course Registration up to 3.1. This issue affects some unknown processing of the file /admin/edit-student-profile.php of the component Student Registration Page. The manipulation of the argument photo results in …
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High 7.3
jackying H-ui.admin preview.php unrestricted upload
A vulnerability was identified in jackying H-ui.admin up to 3.1. This affects an unknown function in the library /lib/webuploader/0.1.5/server/preview.php. The manipulation leads to unrestricted upload. The attack is possible to be carried out remotely. The e…
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Medium 6.3
EmpireSoft EmpireCMS connect.php CheckSaveTranFiletype unrestricted upload
A vulnerability has been found in EmpireSoft EmpireCMS up to 8.0. Impacted is the function CheckSaveTranFiletype of the file e/class/connect.php. Such manipulation leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclos…