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
3,441 results · Feed
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High 7.3
hzmanyun Education and Training System saveImage unrestricted upload
A vulnerability classified as critical was found in hzmanyun Education and Training System 3.1.1. This vulnerability affects the function saveImage. The manipulation of the argument file leads to unrestricted upload. The attack can be initiated remotely. The …
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Critical 10.0
WordPress Simplified Plugin Plugin <= 1.0.6 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in kodeshpa Simplified simplified allows Using Malicious Files.This issue affects Simplified: from n/a through <= 1.0.6.
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High 8.8
Learning Digital Orca HCM - Arbitrary File Upload
Orca HCM from LEARNING DIGITAL has an Arbitrary File Upload vulnerability, allowing remote attackers with regular privileges to upload and run web shells
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High 7.3
needyamin Library Card System Add Picture signup.php unrestricted upload
A vulnerability was found in needyamin Library Card System 1.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /signup.php of the component Add Picture. The manipulation leads to unrestricted upload. T…
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High 8.1
CWE-434: Unrestricted Upload of File with Dangerous Type vulnerability exists that could render the device inoperable w…
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Medium 4.9
A CWE-434 "Unrestricted Upload of File with Dangerous Type" in the template file uploads in Q-Free MaxTime less than or…
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Critical 9.9
Brizy – Page Builder <= 2.6.4 - Authenticated (Contributor+) Arbitrary File Upload via storeUploads
The Brizy – Page Builder plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'storeUploads' function in all versions up to, and including, 2.6.4. This makes it possible for authenticated attackers, with Cont…
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Critical 9.8
Security & Malware scan by CleanTalk <= 2.149 - Unauthenticated Arbitrary File Upload
The Security & Malware scan by CleanTalk plugin for WordPress is vulnerable to arbitrary file uploads due to the plugin uploading and extracting .zip archives when scanning them for malware through the checkUploadedArchive() function in all versions up to, an…
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High 8.8
All-Images.ai – IA Image Bank and Custom Image creation <= 1.0.4 - Authenticated (Subscriber+) Arbitrary File Upload
The All-Images.ai – IA Image Bank and Custom Image creation plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the '_get_image_by_url' function in all versions up to, and including, 1.0.4. This makes it possibl…
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High 8.8
Authenticated Arbitrary Python File Upload via Plugin Manager
An authenticated attacker is able to use the Plugin Manager of the web interface of the Wattsense Bridge devices to upload malicious Python files to the device. This enables an attacker to gain remote root access to the device. An attacker needs a valid user …
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Medium 6.3
SourceCodester Food Menu Manager update.php unrestricted upload
A vulnerability has been found in SourceCodester Food Menu Manager 1.0 and classified as critical. Affected by this vulnerability is an unknown functionality of the file endpoint/update.php. The manipulation leads to unrestricted upload. The attack can be lau…
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High 7.3
Lumsoft ERP FileUploadApi.ashx DoWebUpload unrestricted upload
A vulnerability, which was classified as critical, was found in Lumsoft ERP 8. Affected is the function DoUpload/DoWebUpload of the file /Api/FileUploadApi.ashx. The manipulation of the argument file leads to unrestricted upload. It is possible to launch the …
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Critical 9.8
WP Foodbakery <= 4.7 - Unauthenticated Arbitrary File Upload
The WP Foodbakery plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'upload_publisher_profile_image' function in versions up to, and including, 4.7. This makes it possible for unauthenticated attacker…
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High 7.2
An arbitrary file upload vulnerability in the component /comm/upload of cool-admin-java v1.0 allows attackers to execut…
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High 7.3
An arbitrary file upload vulnerability in the component /userPicture of Timo v2.0.3 allows attackers to execute arbitra…
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High 8.8
In Code-projects Shopping Portal v1.0, the insert-product.php page has an arbitrary file upload vulnerability.
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High 7.5
Cockpit Arbitrary File Upload
Versions of the package cockpit-hq/cockpit before 2.4.1 are vulnerable to Arbitrary File Upload where an attacker can use different extension to bypass the upload filter.
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High 8.1
Contact Manager <= 8.6.4 - Unauthenticated Arbitrary Double File Extension Upload
The Contact Manager plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the contact form upload feature in all versions up to, and including, 8.6.4. This makes it possible for unauthenticated attackers to upload…
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High 7.2
Checkmk NagVis Remote Code Execution
The "NagVis" component within Checkmk is vulnerable to remote code execution. An authenticated attacker with administrative level privileges is able to upload a malicious PHP file and modify specific settings to execute the contents of the file as PHP.
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Critical 9.8
ChestnutCMS <=1.5.0 is vulnerable to File Upload via the Create template function.
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Critical 9.9
Advantive VeraCore before 2024.4.2.1 allows remote authenticated users to upload files to unintended folders (e.g., one…
KEV Mar 10, 2025 -
High 8.8
This vulnerability allows a high-privileged authenticated PAM user to achieve remote command execution on the affected …
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Medium 4.3
DevDojo Voyager Arbitrary File Write
DevDojo Voyager through version 1.8.0 is vulnerable to bypassing the file type verification when an authenticated user uploads a file via /admin/media/upload. An authenticated user can upload a web shell causing arbitrary code execution on the server.
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High 8.7
Tandoor Recipes - Stored XSS through Unrestricted File Upload
Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. The file upload feature allows to upload arbitrary files, including html and svg. Both can contain malicious content (XSS Payloads). This vulnerability is fix…
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Critical 9.8
ThemeREX Addons <= 2.32.3 - Unauthenticated Arbitrary File Upload in trx_addons_uploads_save_data
The ThemeREX Addons plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'trx_addons_uploads_save_data' function in all versions up to, and including, 2.32.3. This makes it possible for unauthenticated attack…
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Medium 4.7
needyamin image_gallery Cover Image gallery.php unrestricted upload
A vulnerability classified as critical was found in needyamin image_gallery 1.0. This vulnerability affects unknown code of the file /admin/gallery.php of the component Cover Image Handler. The manipulation of the argument image leads to unrestricted upload. …
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Critical 9.8
WPBookit <= 1.6.9 - Unauthenticated Arbitrary File Upload
The WPBookit plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'WPB_Profile_controller::handle_image_upload' function in versions up to, and including, 1.6.9. This makes it possible for unauthenticate…
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Medium 6.3
JoeyBling bootplus SysFileController.java unrestricted upload
A vulnerability classified as critical was found in JoeyBling bootplus up to 247d5f6c209be1a5cf10cd0fa18e1d8cc63cf55d. This vulnerability affects unknown code of the file src/main/java/io/github/controller/SysFileController.java. The manipulation of the argum…
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Critical 9.1
WordPress Tourfic plugin <= 2.15.3 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Themefic Tourfic tourfic allows Upload a Web Shell to a Web Server.This issue affects Tourfic: from n/a through <= 2.15.3.
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High 8.0
IBM Planning Analytics file upload
IBM Planning Analytics 2.0 and 2.1 could be vulnerable to malicious file upload by not validating the content of the file uploaded to the web interface. Attackers can make use of this weakness and upload malicious executable files into the system, and it can …
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High 8.0
IBM Planning Analytics file upload
IBM Planning Analytics 2.0 and 2.1 could be vulnerable to malicious file upload by not validating the type of file in the File Manager T1 process. Attackers can make use of this weakness and upload malicious executable files into the system that can be sent t…
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High 7.6
Arbitrary file upload, deletion and read through header manipulation
A vulnerability found in Xerox Workplace Suite allows arbitrary file read, upload, and deletion on the server through crafted header manipulation. By exploiting improper validation of headers, attackers can gain unauthorized access to data
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Critical 10.0
WordPress user files plugin <= 2.4.2 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Scriptonite user files user-files allows Upload a Web Shell to a Web Server.This issue affects user files: from n/a through <= 2.4.2.
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Critical 9.1CVE-2025-23942 Public exploit
WordPress WP Load Gallery Plugin <= 2.1.6 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in ngocuct0912 WP Load Gallery wp-load-gallery allows Upload a Web Shell to a Web Server.This issue affects WP Load Gallery: from n/a through <= 2.1.6.
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Critical 9.9
WordPress Smallerik File Browser plugin <= 1.1 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Enrico Sandoli Smallerik File Browser smallerik-file-browser allows Upload a Web Shell to a Web Server.This issue affects Smallerik File Browser: from n/a through <= 1.1.
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Critical 9.0
WordPress Multi Uploader for Gravity Forms plugin <= 1.1.3 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in sh1zen Multi Uploader for Gravity Forms gf-multi-uploader allows Upload a Web Shell to a Web Server.This issue affects Multi Uploader for Gravity Forms: from n/a through <= 1.1.3.
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Critical 9.8
WPBot Pro Wordpress Chatbot <= 13.5.4 - Unauthenticated Arbitrary File Upload
The WPBot Pro Wordpress Chatbot plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'qcld_wpcfb_file_upload' function in all versions up to, and including, 13.5.4. This makes it possible for unauthenticated …
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Critical 9.1
WordPress Barcode Scanner and Inventory manager plugin <= 1.6.7 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Dmitry V. (CEO of "UKR Solution") Barcode Scanner with Inventory & Order Manager barcode-scanner-lite-pos-to-manage-products-inventory-and-orders allows Upload a Web Shell to a Web Server.This i…
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Critical 9.0
WordPress Fancy Product Designer plugin <= 6.4.3 - Unauthenticated Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in radykal Fancy Product Designer fancy-product-designer.This issue affects Fancy Product Designer: from n/a through <= 6.4.3.
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Medium 4.7
itsourcecode Farm Management System add-pig.php unrestricted upload
A vulnerability classified as critical was found in itsourcecode Farm Management System up to 1.0. This vulnerability affects unknown code of the file /add-pig.php. The manipulation of the argument pigphoto leads to unrestricted upload. The attack can be init…