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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Medium 4.7
xnx3 wangmarket XML File uploadImage.do uploadImage unrestricted upload
A vulnerability has been found in xnx3 wangmarket up to 6.4. The impacted element is the function uploadImage of the file /sits/uploadImage.do of the component XML File Handler. The manipulation of the argument image leads to unrestricted upload. Remote explo…
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Medium 6.3
campcodes School File Management System save_file.php unrestricted upload
A security vulnerability has been detected in campcodes School File Management System 1.0. The affected element is an unknown function of the file /save_file.php. The manipulation of the argument File leads to unrestricted upload. The attack may be initiated …
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Medium 5.6
Unvalidated File Upload vulnerability in ArcGIS Server.
ArcGIS Server versions 11.5 and earlier on Windows and Linux do not sufficiently validate uploaded files, enabling a remote unauthenticated attacker to upload arbitrary files to the server’s designated upload directories. However, the server’s architecture en…
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Medium 5.6
Unvalidated File Upload vulnerability in ArcGIS Server.
ArcGIS Server versions 11.5 and earlier on Windows and Linux do not sufficiently validate uploaded files, enabling a remote unauthenticated attacker to upload arbitrary files to the server’s designated upload directories. However, the server’s architecture en…
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Medium 4.7
newbee-mall-plus Product Information Edit UploadController.java upload unrestricted upload
A vulnerability was determined in newbee-mall-plus 2.0.0. This impacts the function Upload of the file src/main/java/ltd/newbee/mall/controller/common/UploadController.java of the component Product Information Edit Page. This manipulation of the argument File…
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Medium 4.7
BiggiDroid Simple PHP CMS Site Logo edit.php unrestricted upload
A security flaw has been discovered in BiggiDroid Simple PHP CMS 1.0. This impacts an unknown function of the file /admin/edit.php of the component Site Logo Handler. Performing a manipulation of the argument image results in unrestricted upload. Remote explo…
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Critical 9.9
WordPress MapSVG plugin <= 8.7.3 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in RomanCode MapSVG allows Upload a Web Shell to a Web Server.This issue affects MapSVG: from n/a through 8.7.3.
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Medium 6.3
code-projects College Notes Uploading System userprofile.php unrestricted upload
A security vulnerability has been detected in code-projects College Notes Uploading System 1.0. Impacted is an unknown function of the file /dashboard/userprofile.php. The manipulation of the argument image leads to unrestricted upload. Remote exploitation of…
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High 8.8
Priority - CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-434 Unrestricted Upload of File with Dangerous Type
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Medium 4.7
code-projects/anirbandutta9 Content Management System/News-Buzz editposts.php unrestricted upload
A security flaw has been discovered in code-projects/anirbandutta9 Content Management System and News-Buzz 1.0. This vulnerability affects unknown code of the file /admin/editposts.php. Performing manipulation of the argument image results in unrestricted upl…
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Critical 9.8
WELLTEND TECHNOLOGY｜ BPMFlowWebkit - Arbitrary File Upload
BPMFlowWebkit developed by WELLTEND TECHNOLOGY has a Arbitrary File Upload vulnerability, allowing unauthenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
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Critical 9.8
Sunnet｜WMPro - Arbitrary File Upload
WMPro developed by Sunnet has a Arbitrary File Upload vulnerability, allowing unauthenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
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Critical 10.0
Upload Arbitrary Files
Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.
KEV Jan 26, 2026 -
High 7.7
Unrestricted File Upload and RCE in Innorix WP
Unrestricted Upload of File with Dangerous Type vulnerability in Innorix Innorix WP allows Upload a Web Shell to a Web Server.This issue affects Innorix WP from All versions If the "exam" directory exists under the directory where the product is installed (ex…
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Critical 9.8
givanz VvvebJs 1.7.2 is vulnerable to Insecure File Upload.
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Critical 9.8
givanz VvvebJs 1.7.2 suffers from a File Upload vulnerability via save.php.
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Critical 9.8CVE-2025-57460 Public exploit
File upload vulnerability in machsol machpanel 8.0.32 allows attacker to gain a webshell.
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Medium 6.3
h-moses moga-mall PmsProductController.java addProduct unrestricted upload
A vulnerability was identified in h-moses moga-mall up to 392d631a5ef15962a9bddeeb9f1269b9085473fa. This vulnerability affects the function addProduct of the file src/main/java/com/ms/product/controller/PmsProductController.java. Such manipulation of the argu…
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Medium 4.7
jackq XCMS Backend ProductImageController.class.php upload unrestricted upload
A vulnerability has been found in jackq XCMS up to 3fab5342cc509945a7ce1b8ec39d19f701b89261. Affected is the function Upload of the file Admin/Home/Controller/ProductImageController.class.php of the component Backend. Such manipulation of the argument File le…
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High 7.3
jackq XCMS upload.php unrestricted upload
A flaw has been found in jackq XCMS up to 3fab5342cc509945a7ce1b8ec39d19f701b89261. This impacts an unknown function of the file Public/javascripts/admin/plupload-2.1.2/examples/upload.php. This manipulation causes unrestricted upload. It is possible to initi…
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High 8.8
Arbitrary File Upload in EchoCCS's Specto CM
Unrestricted Upload of File with Dangerous Type vulnerability in Echo Call Center Services Trade and Industry Inc. Specto CM allows Remote Code Inclusion. This issue affects Specto CM: before 17032025.
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Medium 6.3
code-projects Student File Management System save_file.php unrestricted upload
A security vulnerability has been detected in code-projects Student File Management System 1.0. This affects an unknown part of the file /save_file.php. Such manipulation of the argument File leads to unrestricted upload. The attack can be executed remotely. …
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Critical 9.8
Cadmium CMS has a background arbitrary file upload vulnerability
Cadmium CMS v.0.4.9 has a background arbitrary file upload vulnerability in /admin/content/filemanager/uploads.
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Critical 9.8
ProjectSend r1605 Remote Code Execution via File Extension Manipulation
ProjectSend r1605 contains a remote code execution vulnerability that allows attackers to upload malicious files by manipulating file extensions. Attackers can upload shell scripts with disguised extensions through the upload.process.php endpoint to execute a…
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High 8.8
WebTareas 2.4 Authenticated Remote Code Execution via File Upload
WebTareas 2.4 contains a file upload vulnerability that allows authenticated users to upload malicious PHP files through the chat photo upload functionality. Attackers can upload a PHP file with arbitrary code to the /files/Messages/ directory and execute it …
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Medium 6.3
liweiyi ChestnutCMS Filename upload FilenameUtils.getExtension unrestricted upload
A flaw has been found in liweiyi ChestnutCMS up to 1.5.8. This vulnerability affects the function FilenameUtils.getExtension of the file /dev-api/common/upload of the component Filename Handler. Executing manipulation of the argument File can lead to unrestri…
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Critical 10.0
Umbraco CMS has an arbitrary file upload vulnerability
An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file. NOTE: this is disputed by the Supplier because the responsibility for file validation (as shown in the documentation) bel…
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Critical 9.6
An arbitrary file upload vulnerability in the Attachments module of Frappe Framework v15.89.0 allows attackers to execu…
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High 8.1
Redirection for Contact Form 7 <= 3.2.7 - Unauthenticated Arbitrary File Copy via move_file_to_upload
The Redirection for Contact Form 7 plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'move_file_to_upload' function in all versions up to, and including, 3.2.7. This makes it possible for unauthenticated a…
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Critical 9.8
File Uploader for WooCommerce <= 1.0.3 - Unauthenticated Arbitrary File Upload via add-image-data
The File Uploader for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the callback function for the 'add-image-data' REST API endpoint in all versions up to, and including, 1.0.3. This makes it p…
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Critical 9.8
InnovaStudio WYSIWYG Editor 5.4 Unrestricted File Upload via Filename Manipulation
InnovaStudio WYSIWYG Editor 5.4 contains an unrestricted file upload vulnerability that allows attackers to bypass file extension restrictions through filename manipulation. Attackers can upload malicious ASP shells by using null byte techniques and alternate…
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High 8.8
Flatnux 2021-03.25 Authenticated File Upload Remote Code Execution
Flatnux 2021-03.25 contains an authenticated file upload vulnerability that allows administrative users to upload arbitrary PHP files through the file manager. Attackers with admin credentials can upload malicious PHP scripts to the web root directory, enabli…
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High 8.8
Dotclear 2.25.3 Authenticated Remote Code Execution via File Upload
Dotclear 2.25.3 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files with .phar extension through the blog post creation interface. Attackers can upload files containing PHP system commands that exec…
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Medium 5.3
Turms AI-Serving module v0.10.0-SNAPSHOT and earlier contains an improper file type validation vulnerability in the OCR…
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Critical 9.1
Weblate has git config file overwrite vulnerability that leads to remote code execution
Weblate is a web based localization tool. In versions prior to 5.15.1, it was possible to overwrite Git configuration remotely and override some of its behavior. Version 5.15.1 fixes the issue.
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High 8.8
Advantech WebAccess/SCADA Unrestricted Upload of File with Dangerous Type
Advantech WebAccess/SCADA is vulnerable to unrestricted file upload, which may allow an attacker to remotely execute arbitrary code.
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High 8.8
File Thingie 2.5.7 Authenticated Arbitrary File Upload Remote Code Execution
File Thingie 2.5.7 contains an authenticated file upload vulnerability that allows remote attackers to upload malicious PHP zip archives to the web server. Attackers can create a custom PHP payload, upload and unzip it, and then execute arbitrary system comma…
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High 8.8
Kentico Xperience <= 12.0.29 MVC Forms Unrestricted File Upload
An unrestricted file upload vulnerability in Kentico Xperience allows authenticated users with 'Read data' permissions to upload arbitrary file types via MVC form file uploader components. Attackers can manipulate file names and upload potentially malicious f…
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Medium 6.3
SourceCodester Client Database Management System Leads Generation user_leads.php unrestricted upload
A flaw has been found in SourceCodester Client Database Management System 1.0. This affects an unknown part of the file /user_leads.php of the component Leads Generation Module. Executing manipulation can lead to unrestricted upload. The attack can be launche…
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Critical 9.0
WordPress WP Webhooks plugin <= 3.3.8 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Cozmoslabs WP Webhooks wp-webhooks allows Path Traversal.This issue affects WP Webhooks: from n/a through <= 3.3.8.