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
3,428 results · Feed
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Medium 6.3
OpenBoxes Document Upload Controller DocumentController.groovy DocumentController unrestricted upload
A security vulnerability has been detected in OpenBoxes up to 0.9.1. This issue affects the function DocumentController of the file grails-app/controllers/org/pih/warehouse/core/DocumentController.groovy of the component Document Upload Controller. The manipu…
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Critical 9.8CVE-2026-15748 Public exploit
Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration
The Forminator Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.56.1 via the handle_file_upload function. This is due to insufficient file type validation in handle_file_upload, where the dangerous-exte…
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High 8.8
WordPress is vulnerable to a remote code execution vulnerability via malicious Postscript file upload by an Author leve…
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High 7.2
Path traversal via unsanitized upload filename leads to arbitrary file write in Progress ShareFile Storage Zones Controller
In Progress ShareFile Storage Zones Controller v5.12.5 and below, a party with valid zone credentials can perform path traversal using resumable upload initiation endpoint, allowing the party to write arbitrary content to any location writable by the applicat…
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High 8.8
2100 Technology｜Official Document Management System - Arbitrary File Upload
Official Document Management System developed by 2100 Technology 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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High 8.8
File Upload vulnerability in T-Systems International GmbH ImageMaster Version: 9.14.2.8.1 allows a remote attacker to e…
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Critical 9.8
File Upload vulnerability in RainyGao-Hithub DocSys v.2.02.80 allows a remote attacker to execute arbitrary code
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Critical 9.8
ProSolution WP Client <= 2.0.10 - Unauthenticated Arbitrary File Upload via Content-Disposition Header Filename Override
The ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.0.10 via the proSol_handleFileUpload function. This is due to missing validation of the attacker-controlled Content-Disposition heade…
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High 8.8
Query Wrangler <= 1.5.57 - Authenticated (Subscriber+) Remote Code Execution via 'options' Parameter
The Query Wrangler plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.5.57 via the 'options' parameter parameter. This is due to missing capability check and nonce verification on the wp_ajax_qw_form_ajax handl…
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High 8.7
Unbounded DAA Decompression in Pandora Allows Denial of Service via Decompression Bomb
Pandora contains a denial-of-service vulnerability in its handling of DAA (Direct Access Archive) files. When extracting the internal ISO image from a DAA archive, compressed chunks were decompressed using zlib.decompress() without enforcing a limit on the re…
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High 8.8
Templately <= 3.7.1 - Authenticated (Contributor+) Arbitrary File Upload to Remote Code Execution via Gutenberg Cloud Import Attachment Filename Mismatch
The Templately – Elementor & Gutenberg Template Library: 6500+ Free & Pro Ready Templates And Cloud! plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 3.7.1 via the fetch_remote_file function. This is due to a f…
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High 8.8
MaxUpload <= 1.4.0 - Unauthenticated Arbitrary File Upload via 'resumableFilename' Parameter
The MaxUpload – Big File Uploads – Increase Maximum File Upload Size plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.4.0 via the handle_upload function. This is due to a filename-validation mismatch in the h…
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Medium 4.7
SourceCodester Simple Doctors Appointment System save_file.php save_doctor unrestricted upload
A vulnerability was detected in SourceCodester Simple Doctors Appointment System 1.0. This issue affects the function save_doctor of the file /save_file.php. The manipulation results in unrestricted upload. The attack can be executed remotely. The exploit is …
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High 7.2
Dell Wyse Management Suite (WMS), versions prior to 2605.0.2, contain an Unrestricted Upload of File with Dangerous Typ…
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High 7.2
Dell Wyse Management Suite (WMS), versions prior to 2605.0.2, contain an Unrestricted Upload of File with Dangerous Typ…
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Medium 6.5
Release attachment extension allowlist bypass via web release edit form (variant of CVE-2025-68939)
Release attachment extension allowlist bypass via web release edit form (variant of CVE-2025-68939)
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Critical 9.8
WebErpMesv2 has Unauthenticated RCE via Unrestricted File Upload in HR Expense scan_file (CWE-434)
WebErpMesv2 is a Resource Management and Manufacturing execution system Web for industry. Versions 1.19 and prior allow any self-registered user to upload arbitrary PHP files through the HR Expense scan_file parameter, leading to Remote Code Execution. Combin…
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Medium 6.8
WhatsUp Gold versions prior to 26.0.2 contain an arbitrary file write vulnerability in the LogToFile action handler.
In WhatsUp Gold versions released before 2026.0.2, a privileged attacker can create a LogToFile action specifying an arbitrary file extension within the IIS web root.
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Critical 9.8
WooCommerce Subscriptions < 9.1.0 - Unauthenticated RCE via PHP Object Injection
The WooCommerce Subscriptions WordPress plugin before 9.1.0 does not validate user input before unserializing it on stores with High-Performance Order Storage enabled, leading to a PHP Object Injection issue which unauthenticated users can escalate to Remote …
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Critical 9.8
Gift Cards For WooCommerce Pro < 4.2.10 - Unauthenticated Arbitrary File Upload
The giftware WordPress plugin before 4.2.10 does not validate the type of uploaded files in one of its upload paths, allowing unauthenticated users to upload arbitrary files, including PHP code, which can lead to remote code execution.
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High 8.8
Malcolm vulnerable to RCE via unrestricted .php upload to the file-upload component
Malcolm is a network traffic analysis tool suite. The file-upload component (FilePond PHP backend) accepts uploads at `POST /server/php/submit.php` and stores them in a directory served by the same nginx and php-fpm instance. The allow-list that should restri…
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High 7.5
InstaWP Connect <= 0.1.3.6 - Unauthenticated Cryptographic Key Disclosure
The InstaWP Connect – 1-click WP Staging & Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 0.1.3.6 via the (top-level script) function. This is due to the plugin stores its encrypted options file as …
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High 7.7
n8n before 1.123.67 Arbitrary File Write via Edit Image Node
n8n versions before 1.123.67, 2.31.5, and 2.32.1 contain an arbitrary file write vulnerability in the Edit Image node, which passes its output format parameter to the underlying image library without validation. An authenticated user able to run workflows can…
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High 8.8
Cockpit CMS Cockpit CMS - Unrestricted File Upload
An unrestricted file upload vulnerability in Cockpit CMS 2.6.0 allows authenticated users to upload files of any extension including PHP scripts via the asset upload endpoint. The allowed_uploads configuration defaults to wildcard (*) and uploaded files are s…
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Medium 6.5
Wildfly-core: wildfly: arbitrary file read via malicious archive deployment
A flaw was found in wildfly-core. A remote attacker, authenticated as a 'deployer' account, can import and deploy a malicious archive file from an untrusted source. This is achieved by leveraging WildFly libraries to craft a Java project that allows an HTTP P…
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Critical 9.8
dulldusk phpfm - Unauthenticated Remote Code Execution via Unrestricted PHP File Upload
An unrestricted file upload vulnerability in dulldusk/phpfm through 1.8.0 allows an unauthenticated remote attacker to execute arbitrary PHP code on the server. The application ships with an empty upload extension filter ( = array) and no authentication enabl…
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Critical 9.8
Product Input Fields for WooCommerce < 2.0.2 - Unauthenticated Arbitrary File Upload
The Product Input Fields for WooCommerce WordPress plugin before 2.0.2 does not validate uploaded file types when its accepted-types setting is left empty, which its own documentation advertises as accepting all files, allowing unauthenticated attackers to up…
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High 8.8
Squeeze < 1.7.12 - Author+ Arbitrary File Upload
The Squeeze WordPress plugin before 1.7.12 does not validate the file type or extension of the per-size image data written by one of its attachment-update actions, allowing users with the upload_files capability (Author and above) to write an executable PHP f…
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Medium 4.7
saithink/saigroup SaiAdmin Plugin Upload Endpoint upload shell_exec unrestricted upload
A security vulnerability has been detected in saithink/saigroup SaiAdmin up to 5.0.1. This impacts the function shell_exec of the file /app/saipackage/install/upload of the component Plugin Upload Endpoint. The manipulation leads to unrestricted upload. Remot…
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Medium 6.3
SourceCodester Photo Share Website ajax.php save_upload unrestricted upload
A vulnerability has been found in SourceCodester Photo Share Website 1.0. The impacted element is an unknown function of the file /social/ajax.php?action=save_upload. Such manipulation of the argument img[]/imgName[] leads to unrestricted upload. The attack m…
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Critical 9.8
Weaver E-cology 9.0 File Upload RCE via uploaderOperate.jsp
Weaver (Fanwei) E-cology 9.0 versions prior to 10.52 contain a file upload vulnerability that allows a remote, unauthenticated attacker to upload arbitrary files, including JSP webshells, by submitting a multipart/form-data POST request to /workrelate/plan/ut…
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Medium 5.3
Statamic: Missing file upload validation on frontend forms allows uploading disallowed file types
Statamic is a Laravel and Git powered content management system (CMS). Prior to 5.74.3 and 6.24.2, public frontend forms did not enforce the file upload restrictions that the Control Panel enforces, so an unauthenticated visitor could upload file types an adm…
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Critical 9.8
Dinky Unauthenticated Arbitrary File Write via /download/uploadFromRsByLocal Gated Only by Hardcoded Default Token
Dinky's POST /download/uploadFromRsByLocal handler passes the caller-supplied path parameter directly to new File(path) and file.transferTo(dest) with no path validation. The route is marked @SaIgnore and /download/** is excluded from the Sa-Token interceptor…
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Medium 6.3
SourceCodester Online Examination & Learning Management System upload_files.php unrestricted upload
A vulnerability was determined in SourceCodester Online Examination & Learning Management System 1.0. This issue affects some unknown processing of the file upload_files.php. This manipulation causes unrestricted upload. The attack may be initiated remotely.
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Critical 9.1
Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
The System REST API accepts user-supplied file uploads without enforcing sufficient validation on the file type or destination, allowing files to be written to arbitrary server-accessible locations. Exploitation requires authenticated administrative access wi…
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Critical 10.0
WordPress Type Hub plugin <= 2.0.6 - Arbitrary File Upload vulnerability
Unauthenticated Arbitrary File Upload in Type Hub <= 2.0.6 versions.
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Critical 9.8
ICS-Park Smart Park Management System v2.0 contains an unrestricted file upload vulnerability in the file upload module…
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High 7.3
Rongzhitong Visual Integrated Command and Dispatch Platform upload unrestricted upload
A vulnerability was detected in Rongzhitong Visual Integrated Command and Dispatch Platform up to 20260617. Impacted is an unknown function of the file /dm/dispatch/userinfo/upload. Performing a manipulation of the argument File results in unrestricted upload…
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Medium 6.3
imranrisal-dev Student-Management-System Shared Upload Helper student_profile_pic.php storeProfileImage unrestricted upload
A vulnerability was determined in imranrisal-dev Student-Management-System 18ea7904c339e0c7b0234724a79c939ce6191def/a8d43a29aaf267e7ca97171d6dbb44057bcd7f8c. This affects the function storeProfileImage of the file student_profile_pic.php of the component Shar…
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High 7.2
wp-downloadmanager - Unrestricted File Upload via Missing Extension/MIME Validation and Path Traversal
The wp-downloadmanager WordPress plugin, in version 1.68.11 (also affecting the 6.9.4 release line), allows an admin-privileged user (current_user_can('manage_downloads')) to upload arbitrary files via download-add.php with no extension or MIME-type validatio…