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
1,208 results · Clear filters · Feed
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High 7.3
Trippo ResponsiveFilemanager dialog.php unrestricted upload
A security flaw has been discovered in Trippo ResponsiveFilemanager up to 9.14.0. The impacted element is an unknown function of the file filemanager/dialog.php. The manipulation results in unrestricted upload. The attack may be performed from remote. The exp…
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High 7.2
freo2 provided by refirio contains an unrestricted upload of file with dangerous type vulnerability. A user with the hi…
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High 7.2
WebsiteBaker CMS < 2.13.10 File Upload RCE via Module Installation
WebsiteBaker CMS before 2.13.10 contains an unrestricted file upload vulnerability in the module installation feature that allows authenticated administrators to achieve remote code execution by uploading a crafted ZIP archive containing a PHP webshell alongs…
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High 7.2
OpenEMR Authenticated SQL Injection via backup.php Import Feature
OpenEMR through 8.2.0 contains an authenticated SQL injection vulnerability in the backup configuration import feature that allows administrators with admin or super ACL privileges to execute arbitrary DDL and DML statements against the application database b…
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High 7.2CVE-2026-13157 Public exploit
Theme Demo Import <= 1.1.3 - Admin+ Arbitrary File Upload
The Demo Import WordPress plugin through 1.1.3 does not validate the type of files uploaded during demo-content import (the WordPress file-type test is disabled), allowing high-privilege users (Administrator by default, including non-super-admin site administ…
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High 7.2CVE-2026-13158 Public exploit
Everest Toolkit <= 1.2.3 - Admin+ Arbitrary File Upload
The Everest Toolkit WordPress plugin through 1.2.3 does not validate the type of files uploaded during demo-content import (the WordPress file-type test is disabled), allowing high-privilege users (Administrator by default, including non-super-admin site admi…
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High 7.5
Redaxo has a Mediapool isAllowedExtension bypass via multi-segment filename that leads to authenticated RCE on Apache mod_php multi-extension handlers
REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo/src/addons/mediapool/lib/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG/PHP polyglot named she…
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High 8.8
Realtyna Organic IDX plugin + WPL Real Estate <= 5.3.0 - Authenticated (Subscriber+) Arbitrary File Upload
The Realtyna Organic IDX plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to, and including, 5.3.0. This is due to missing file extension and content validation in the saveLiveImages() function combined with an insufficient authoriza…
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High 8.8CVE-2026-67206 Public exploit
Wolf CMS 0.8.3.1 Authenticated RCE via FileManagerController File Upload
Wolf CMS through 0.8.3.1 contains a remote code execution vulnerability in FileManagerController that allows authenticated attackers to create arbitrary PHP files by exploiting missing file extension validation in the create_file() and save() functions. Attac…
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High 7.1
File Upload vulnerability
A low-privileged remote attacker with "operator" access can upload arbitrary files via the REST endpoint intended for firmware updates, resulting in persistent storage of attacker-controlled files and potentially exhausting resources, which might lead to Deni…
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High 8.8
Extra Checkout Options (addon for Extra Product Options & Add-Ons for WooCommerce) <= 2.3.2 - Missing Authorization to Authenticated (Subscriber+) Arbitrary File Upload in eco_save_settings
The Extra Checkout Options (addon for Extra Product Options & Add-Ons for WooCommerce) plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.3.2. This is due to missing authorization and nonce validation in the ec…
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High 7.2
Easy Digital Downloads <= 3.6.9 - Authenticated (Shop Manager+) Arbitrary File Upload via 'edd-import-file' Parameter
The Easy Digital Downloads plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to and including 3.6.9. This is due to insufficient file type validation in the edd_do_ajax_import_file_upload() function , which only checks the client-supp…
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High 8.1
WPForms Pro <= 1.10.1.1 - Unauthenticated Arbitrary File Write via Chunked Upload Init/Finalize Ordering
The WPForms Pro plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.10.1.1 via the ajax_chunk_upload_finalize function. This is due to the file type validation occurring after chunk metadata and file contents ha…
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High 7.3
D-Link DNS-320 multi_uploadify.php unrestricted upload
A vulnerability has been found in D-Link DNS-320 1.0.2. Impacted is an unknown function of the file /web/jquery/uploader/multi_uploadify.php. The manipulation of the argument Filedata[] leads to unrestricted upload. Remote exploitation of the attack is possib…
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High 7.3
D-Link DNS-320 multi_uploadify.php unrestricted upload
A vulnerability was detected in D-Link DNS-320 1.0.2. This impacts an unknown function of the file /mydlink/multi_uploadify.php. Performing a manipulation of the argument Filedata[] results in unrestricted upload. The attack is possible to be carried out remo…
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High 7.3
D-Link DNS-320 save_ajax.php unrestricted upload
A security vulnerability has been detected in D-Link DNS-320 1.0.2. This affects an unknown function of the file /web/function/save_ajax.php. Such manipulation of the argument Malicious Handler leads to unrestricted upload. The attack can be executed remotely…
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High 7.3
D-Link DNS-320 uploadify.php unrestricted upload
A weakness has been identified in D-Link DNS-320 1.0.2. The impacted element is an unknown function of the file /web/jquery/uploader/uploadify.php. This manipulation of the argument https:/ucn9h68n9289.feishu.cn/wiki/JJcTwHz7aiKeq6kSItMcoeSUnMc?from=from_copy…
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High 7.3
D-Link DNS-320 uploadify.php unrestricted upload
A vulnerability was identified in D-Link DNS-320 1.0.2. Impacted is an unknown function of the file /photo_center/php/uploadify.php. The manipulation of the argument Malicious Handler leads to unrestricted upload. The attack may be initiated remotely. The exp…
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High 7.3
D-Link DNS-320 upload.php unrestricted upload
A vulnerability was determined in D-Link DNS-320 1.0.2. This issue affects some unknown processing of the file /web/web_file/upload.php. Executing a manipulation of the argument File can lead to unrestricted upload. The attack can be launched remotely. The ex…
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High 7.3
Metasoft 美特软件 MetaCRM upload.jsp unrestricted upload
A vulnerability was identified in Metasoft 美特软件 MetaCRM up to 6.4.0 Beta06. The impacted element is an unknown function of the file /business/qnaire/upload.jsp. Such manipulation of the argument File leads to unrestricted upload. The attack may be launched re…
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High 8.8
FreeScout Vulnerable to Authenticated Remote Code Execution via incomplete upload extension denylist (.pht) — bypass of CVE-2025-48471
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.224, the denylist that neutralizes dangerous file uploads (`Helper::$restricted_extensions`) is incomplete: it does not cover the `.pht` extension. The aut…
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High 8.6
HeyForm has unauthenticated /api/upload endpoint that accepts arbitrary files with no auth/session/form context
HeyForm is an open-source form builder. Prior to version 3.0.0-rc.9, `POST /api/upload` has no authentication guard, no global guard, no form-context validation, no `openToken` requirement, and no session cookie check. Any anonymous internet user can upload f…
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High 8.8
Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content <= 4.16.18 - Authenticated (Author+) Limited Unsafe File Upload via upload_mimes Filter Expansion
The Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 4.16.18 via the allowed_mime_types func…
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High 7.1
DataEase: Remote Code Execution (RCE) via Zip Protocol & File Dropper
DataEase is an open source data visualization and analysis tool. Prior to 2.10.23, DataEase can be exploited by uploading payload.zip through the Excel upload API /datasource/upload, creating an H2 datasource that uses the zip: protocol, and executing an SQL …
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High 8.8
Grav before 1.0.3 Remote Code Execution via File Upload Extension Bypass
The Grav API plugin (getgrav/grav-plugin-api) before 1.0.3 contains a file upload extension bypass in the API media controller. HandlesMediaUploads::validateFileExtension() inspects only the final file extension via pathinfo($filename, PATHINFO_EXTENSION), so…
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High 7.3
code-projects Online Job Portal JobSeekerInsert.php unrestricted upload
A weakness has been identified in code-projects Online Job Portal 1.0. This affects an unknown function of the file /JobSeekerInsert.php. Executing a manipulation of the argument txtFile can lead to unrestricted upload. The attack can be executed remotely. Th…
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High 8.8
Laravel-Mediable < 7.0.0 File Upload RCE via Extension Bypass
Laravel-Mediable before 7.0.0 contains a file upload vulnerability that allows unauthenticated attackers to achieve remote code execution by uploading a file with an embedded PHP extension disguised within a double extension such as shell.php.jpg. The PATHINF…
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High 7.3
hcr707305003 shiroiAdmin FileController.php upload unrestricted upload
A vulnerability was determined in hcr707305003 shiroiAdmin 1.1/1.3. Affected is the function FileController::upload of the file app/common/controller/FileController.php. Executing a manipulation of the argument File can lead to unrestricted upload. The attack…
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High 8.8
Swiss Toolkit For WP <= 1.4.6 - Authenticated (Author+) Arbitrary File Upload via upload_extension_files()
The Swiss Toolkit For WP plugin for WordPress is vulnerable to arbitrary file upload due to a flawed file type validation bypass in the `upload_extension_files()` function in all versions up to, and including, 1.4.6. The `upload_extension_files()` function ho…
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High 8.8
NotrinosERP: Authenticated arbitrary file upload leads to remote code execution via HRM employee "Documents" (doc_file)
#### Summary An authenticated user with the HR "Manage Employees" permission (`SA_EMPLOYEE`) can upload a file with an arbitrary extension through the employee **Documents** tab. The handler writes the raw client-supplied filename — extension intact — into a …
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High 7.2
Post Export Import with Media <= 1.13.1 - Authenticated (Administrator+) Arbitrary File Upload via Trailing-Dot Filename Bypass in ZIP Media Import
The Post Export Import with Media plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.13.1 via the import_media_file_secure function. This is due to insufficient file extension validation caused by a trailing-do…
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High 8.8
WHMCS Bridge <= 6.9 - Unauthenticated Arbitrary File Upload via 'ccce' Parameter
The WHMCS Bridge plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the connect() function in all versions up to, and including, 6.9. This makes it possible for authenticated attackers, with Custom-level access…
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High 8.8
Widget Logic Visual <= 1.52 - Authenticated (Subscriber+) Remote Code Execution via 'nwlv[cod-tag]' Parameter
The Widget Logic Visual plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.52 via the widget_logic_visual_check_visibility function. This is due to missing capability check and nonce verification on the widget-…
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High 8.7
DataEase H2 RCE via Zip Protocol & File Dropper Fix bypass
DataEase is an open source data visualization and analysis tool. Prior to 2.10.24, a bypass of the H2 zip protocol and file dropper fix allows an authenticated attacker to upload a zip archive disguised with a .ttf extension through FontManage.saveFile and th…
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High 8.8CVE-2026-23697 Public exploit
Vtiger CRM < 8.4.0 Authenticated File Upload RCE via Documents Module
Vtiger CRM before 8.4.0 contains an authenticated file upload vulnerability that allows low-privileged users to achieve remote code execution by uploading a .phar file containing arbitrary PHP code through the Documents module, bypassing the extension denylis…
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High 7.2CVE-2026-23698 Public exploit
Vtiger CRM 8.4.0 Authenticated RCE via Module Import File Upload
Vtiger CRM through 8.4.0 contains an authenticated remote code execution vulnerability in the admin module import feature that allows administrator-level attackers to upload arbitrary PHP files by submitting a crafted zip archive through the ModuleManager imp…
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High 7.3
Ruijie RG-UAC user_auth_commit.php unrestricted upload
A vulnerability was found in Ruijie RG-UAC up to 1.0-R1.8.2.p5. The impacted element is an unknown function of the file user_auth_commit.php. Performing a manipulation of the argument upload_image results in unrestricted upload. The attack is possible to be c…
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High 8.6
Remote Code Execution in Redeight CMS
An Unrestricted File Upload vulnerability in Redeight CMS version 1.0 allows authenticated attackers to achieve Remote Code Execution via the POST "/admin/index.php?module=pages&mode=FileAdd" endpoint. The application fails to validate file extensions and MIM…
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High 7.8
An unrestricted file upload vulnerability in Nokia MantaRay NM
Nokia MantaRay NM is subject to an unrestricted file upload vulnerability due to insufficient file type validation. Successful exploitation could allow an authenticated attacker to upload malicious files onto the system.
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High 8.6
Remote Code Execution in SzafirHost
SzafirHost verifies the downloaded native library archive with one JarFile parser (reading the Central Directory) but extracts native libraries with JarInputStream parser (reading sequentially from local file headers). An attacker who controls the served arch…