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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Low 3.5
SourceCodester Zipped Folder Manager App add-folder.php unrestricted upload
A vulnerability classified as problematic has been found in SourceCodester Zipped Folder Manager App 1.0. This affects an unknown part of the file /endpoint/add-folder.php. The manipulation of the argument folder leads to unrestricted upload. It is possible t…
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High 8.5
Rockwell Automation ThinManager® ThinServer™ Information Disclosure and Remote Code Execution Vulnerabilities
A remote code execution vulnerability exists in the Rockwell Automation ThinManager® ThinServer™ that allows a threat actor to execute arbitrary code with System privileges. To exploit this vulnerability and a threat actor must abuse the ThinServer™ service b…
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Medium 4.7
Ruijie EG2000K index.php unrestricted upload
A vulnerability has been found in Ruijie EG2000K 11.1(6)B2 and classified as critical. This vulnerability affects unknown code of the file /tool/index.php?c=download&a=save. The manipulation of the argument content leads to unrestricted upload. The attack can…
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Medium 6.3
Chengdu Everbrite Network Technology BeikeShop FileManagerController.php rename unrestricted upload
A vulnerability was determined in Chengdu Everbrite Network Technology BeikeShop up to 1.5.5. This affects the function rename of the file /Admin/Http/Controllers/FileManagerController.php. This manipulation of the argument new_name causes unrestricted upload…
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High 7.2
publiccms V4.0.202302.e and before is vulnerable to Any File Upload via publiccms/admin/cmsTemplate/saveMetaData
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Medium 6.3
SourceCodester E-Commerce System controller.php unrestricted upload
A vulnerability was found in SourceCodester E-Commerce System 1.0. It has been classified as critical. Affected is an unknown function of the file /ecommerce/admin/products/controller.php. The manipulation of the argument photo leads to unrestricted upload. I…
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Medium 6.6CVE-2024-39717 Exploited
The Versa Director GUI provides an option to customize the look and feel of the user interface. This option is only ava…
KEV Aug 23, 2024 -
High 7.5
AcyMailing <= 9.7.2 - Authenticated (Subscriber+) Arbitrary File Upload via acym_extractArchive Function
The AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the acym_extractArchive function in all versions up to, and incl…
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High 7.2
Kashipara Hotel Management System v1.0 is vulnerable to Unrestricted File Upload RCE via /admin/add_room_controller.php.
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High 8.8
An Unrestricted file upload vulnerability was found in "/music/ajax.php?action=save_music" in Kashipara Music Managemen…
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Critical 9.8
An Unrestricted file upload vulnerability was found in "/music/ajax.php?action=signup" of Kashipara Music Management Sy…
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High 8.8
An Unrestricted file upload vulnerability was found in "/music/ajax.php?action=save_playlist" in Kashipara Music Manage…
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High 8.8
An Unrestricted file upload vulnerability was found in "/music/ajax.php?action=save_genre" in Kashipara Music Managemen…
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High 7.2
AdRotate – Ad manager & AdSense Ads <= 5.13.2 - Authenticated (Admin+) Double Extension Arbitrary File Upload
The AdRotate Banner Manager – The only ad manager you'll need plugin for WordPress is vulnerable to arbitrary file uploads due to missing file extension sanitization in the adrotate_insert_media() function in all versions up to, and including, 5.13.2. This ma…
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Medium 6.3
itsourcecode Laravel Property Management System DocumentsController.php UpdateDocumentsRequest unrestricted upload
A vulnerability was found in itsourcecode Laravel Property Management System 1.0. It has been classified as critical. Affected is the function UpdateDocumentsRequest of the file DocumentsController.php. The manipulation leads to unrestricted upload. It is pos…
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Medium 6.3
itsourcecode Laravel Property Management System PropertiesController.php upload unrestricted upload
A vulnerability was found in itsourcecode Laravel Property Management System 1.0 and classified as critical. This issue affects the function upload of the file PropertiesController.php. The manipulation of the argument file leads to unrestricted upload. The a…
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Critical 9.8
An arbitrary file upload vulnerability in ERP commit 44bd04 allows attackers to execute arbitrary code via uploading a …
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Critical 9.9
WordPress Bit Form Pro plugin <= 2.6.4 - Authenticated Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Bit Apps Bit Form Pro allows Command Injection.This issue affects Bit Form Pro: from n/a through 2.6.4.
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Medium 4.7
DouPHP Favicon system.php unrestricted upload
A vulnerability, which was classified as critical, has been found in DouPHP 1.7 Release 20220822. Affected by this issue is some unknown functionality of the file /admin/system.php of the component Favicon Handler. The manipulation of the argument site_favico…
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Medium 4.7
CodeAstro Online Railway Reservation System Profile Photo Update emp-profile-avatar.php unrestricted upload
A vulnerability was found in CodeAstro Online Railway Reservation System 1.0 and classified as critical. Affected by this issue is some unknown functionality of the file /admin/emp-profile-avatar.php of the component Profile Photo Update Handler. The manipula…
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Medium 6.3
DedeBIZ Attachment Settings select_images_post.php get_mime_type unrestricted upload
A vulnerability classified as critical was found in DedeBIZ 6.3.0. This vulnerability affects the function get_mime_type of the file /admin/dialog/select_images_post.php of the component Attachment Settings. The manipulation of the argument upload leads to un…
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Medium 6.3
DedeBIZ archives_do.php AdminUpload unrestricted upload
A vulnerability classified as critical has been found in DedeBIZ 6.3.0. This affects the function AdminUpload of the file admin/archives_do.php. The manipulation of the argument litpic leads to unrestricted upload. It is possible to initiate the attack remote…
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Medium 6.3
DedeBIZ File Extension file_manage_control.php unrestricted upload
A vulnerability was found in DedeBIZ 6.3.0. It has been rated as critical. Affected by this issue is some unknown functionality of the file admin/file_manage_control.php of the component File Extension Handler. The manipulation of the argument upfile1 leads t…
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Medium 6.3
DedeBIZ File Extension media_add.php unrestricted upload
A vulnerability was found in DedeBIZ 6.3.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file admin/media_add.php of the component File Extension Handler. The manipulation of the argument upfile1 leads to…
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High 8.1
Metform Elementor Contact Form Builder <= 3.2.4 - Unauthenticated Double-Extension Arbitrary File Upload
The Metform Elementor Contact Form Builder for WordPress is vulnerable to Arbitrary File Upload due to insufficient file type validation in versions up to, and including, 3.2.4. This allows unauthenticated visitors to perform a "double extension" attack and u…
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High 8.8
File Upload vulnerability in Huizhi enterprise resource management system v.1.0 and before allows a remote attacker to …
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Critical 9.0
Adobe Commerce | Unrestricted Upload of File with Dangerous Type (CWE-434)
Adobe Commerce versions 2.4.7-p1, 2.4.6-p6, 2.4.5-p8, 2.4.4-p9 and earlier are affected by an Unrestricted Upload of File with Dangerous Type vulnerability that could result in arbitrary code execution by an attacker. An attacker could exploit this vulnerabil…
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High 8.8
Slider & Popup Builder by Depicter – Add Image Slider, Carousel Slider, Exit Intent Popup, Popup Modal, Coupon Popup, Post Slider Carousel <= 3.1.1 - Authenticated (Contributor+) Arbitrary File Upload
The Slider and Carousel slider by Depicter plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the uploadFile function in all versions up to, and including, 3.1.1. This makes it possible for authenticated attack…
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Critical 10.0
WordPress BerqWP plugin <= 1.7.6 - Unauthenticated Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in BerqWP allows Code Injection.This issue affects BerqWP: from n/a through 1.7.6.
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High 8.8
Media Library Assistant <= 3.18 - Authenticated (Author+) Arbitrary File Upload via mla-inline-edit-upload-scripts AJAX Action
The Media Library Assistant plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation involving the mla-inline-edit-upload-scripts AJAX action in all versions up to, and including, 3.18. This makes it possible for authen…
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Low 3.1
Multiple Unrestricted File Upload vulnerabilities in SAP BusinessObjects Business Intelligence Platform
SAP BusinessObjects Business Intelligence Platform allows an authenticated attacker to upload malicious code over the network, that could be executed by the application. On successful exploitation, the attacker can cause a low impact on the Integrity of the a…
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Low 3.7
Multiple Unrestricted File Upload vulnerabilities in SAP BusinessObjects Business Intelligence Platform
SAP BusinessObjects Business Intelligence Platform allows an authenticated attacker to upload malicious code over the network, that could be executed by the application. On successful exploitation, the attacker can cause a low impact on the Integrity of the a…
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Medium 4.3
Multiple Unrestricted File Upload vulnerabilities in SAP BusinessObjects Business Intelligence Platform
SAP BusinessObjects Business Intelligence Platform allows an authenticated attacker to upload malicious code over the network, that could be executed by the application. On successful exploitation, the attacker can cause a low impact on the Integrity of the a…
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Medium 4.7
Fujian mwcms uploadfile.html uploadimage unrestricted upload
A vulnerability was found in Fujian mwcms 1.0.0. It has been rated as critical. Affected by this issue is the function uploadimage of the file /uploadfile.html. The manipulation of the argument upfile leads to unrestricted upload. The attack may be launched r…
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Medium 4.7
Fujian mwcms Image Upload uploadeditor.html uploadeditor unrestricted upload
A vulnerability was found in Fujian mwcms 1.0.0. It has been declared as critical. Affected by this vulnerability is the function uploadeditor of the file /uploadeditor.html?action=uploadimage of the component Image Upload. The manipulation of the argument up…
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Critical 9.8
Open eClass Platform allows Arbitrary File Upload in "modules/h5p/save.php"
The Open eClass platform (formerly known as GUnet eClass) is a complete Course Management System. An arbitrary file upload vulnerability in the "save" functionality of the H5P module enables unauthenticated users to upload arbitrary files on the server's file…
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High 7.2CVE-2024-7694 Exploited
TeamT5 ThreatSonar Anti-Ransomware - Arbitrary File Upload
ThreatSonar Anti-Ransomware from TeamT5 does not properly validate the content of uploaded files. Remote attackers with administrator privileges on the product platform can upload malicious files, which can be used to execute arbitrary system command on the s…
KEV Feb 17, 2026 -
High 8.8
Improper limitation of a pathname to a restricted directory vulnerability in Samsung MagicINFO 9 Server version before …
KEV Apr 24, 2026 -
Critical 9.8
An arbitrary file upload vulnerability in the Ueditor component of productinfoquick v1.0 allows attackers to execute ar…
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High 7.5
Open WebUI Arbitrary File Upload + Path Traversal
Attacker controlled files can be uploaded to arbitrary locations on the web server's filesystem by abusing a path traversal vulnerability.