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)
-
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]
-
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.
-
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]
-
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.
-
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.
-
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]
-
Implementation
When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.
-
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
-
Critical 9.8
A file upload bypass vulnerability exists in SOPlanning 1.53.00, specifically in /process/upload.php. This vulnerabilit…
-
High 8.8
A logic issue was addressed with improved file handling. This issue is fixed in iOS 18.2 and iPadOS 18.2, macOS Sequoia…
-
High 8.8
e-Excellence U-Office Force - Arbitrary File Upload
The U-Office Force from e-Excellence has an Arbitrary File Upload vulnerability, allowing remote attackers with regular privileges to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
-
Medium 6.3
IROAD Dash Cam FX2 upload_file unrestricted upload
A vulnerability was found in IROAD Dash Cam FX2 up to 20250308. It has been rated as critical. Affected by this issue is some unknown functionality of the file /action/upload_file. The manipulation leads to unrestricted upload. Access to the local network is …
-
High 7.3
LoveCards LoveCardsV2 image unrestricted upload
A vulnerability was found in LoveCards LoveCardsV2 up to 2.3.2 and classified as critical. This issue affects some unknown processing of the file /api/upload/image. The manipulation of the argument file leads to unrestricted upload. The attack may be initiate…
-
Medium 6.3
zzskzy Warehouse Refinement Management System SaveCrash.ashx UploadCrash unrestricted upload
A vulnerability, which was classified as critical, has been found in zzskzy Warehouse Refinement Management System 1.3. Affected by this issue is the function UploadCrash of the file /crash/log/SaveCrash.ashx. The manipulation of the argument file leads to un…
-
Critical 9.1CVE-2025-28915 Public exploit
WordPress ThemeEgg ToolKit plugin <= 1.2.9 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Theme Egg ThemeEgg ToolKit themeegg-toolkit allows Upload a Web Shell to a Web Server.This issue affects ThemeEgg ToolKit: from n/a through <= 1.2.9.
-
High 7.1
[20250301] - Core - Malicious file uploads via Media Manager
Inadequate checks in the Media Manager allowed users with "edit" privileges to change file extension to arbitrary extension, including .php and other potentially executable extensions.
-
Medium 6.3
zzskzy Warehouse Refinement Management System AcceptZip.ashx ProcessRequest unrestricted upload
A vulnerability, which was classified as critical, was found in zzskzy Warehouse Refinement Management System 3.1. Affected is the function ProcessRequest of the file /AcceptZip.ashx. The manipulation of the argument file leads to unrestricted upload. It is p…
-
High 8.1
Product Input Fields for WooCommerce <= 1.12.0 - Unauthenticated Limited File Upload
The Product Input Fields for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the add_product_input_fields_to_order_item_meta() function in all versions up to, and including, 1.12.0. This may…
-
High 8.8
Aiomatic - AI Content Writer, Editor, ChatBot & AI Toolkit <= 2.3.8 - Missing Authorization to Authenticated (Contributor+) Arbitrary File Upload
The Aiomatic - Automatic AI Content Writer & Editor, GPT-3 & GPT-4, ChatGPT ChatBot & AI Toolkit plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'aiomatic_generate_featured_image' function in all version…
-
High 7.2
SMTP by BestWebSoft <= 1.1.9 - Authenticated (Administrator+) Arbitrary File Upload
The SMTP by BestWebSoft plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'save_options' function in all versions up to, and including, 1.1.9. This makes it possible for authenticated attackers, with Admin…
-
Medium 6.3
s-a-zhd Ecommerce-Website-using-PHP customer_register.php unrestricted upload
A vulnerability was found in s-a-zhd Ecommerce-Website-using-PHP 1.0 and classified as critical. Affected by this issue is some unknown functionality of the file /customer_register.php. The manipulation of the argument name leads to unrestricted upload. The a…
-
Medium 6.3
ChestnutCMS upload uploadFile unrestricted upload
A vulnerability classified as critical has been found in ChestnutCMS up to 1.5.2. This affects the function uploadFile of the file /dev-api/cms/file/upload. The manipulation of the argument file leads to unrestricted upload. It is possible to initiate the att…
-
Critical 9.8
An arbitrary file upload vulnerability in the component /cms/CmsWebFileAdminController.java of PublicCMS v4.0.202406 al…
-
Medium 5.4
REDAXO allows Arbitrary File Upload in the mediapool page
REDAXO is a PHP-based CMS. In Redaxo before 5.18.3, the mediapool/media page is vulnerable to arbitrary file upload. This vulnerability is fixed in 5.18.3.
-
High 8.8
Vasion Print (formerly PrinterLogic) before Virtual Appliance Host 1.0.735 Application 20.0.1330 allows Driver Unrestri…
-
Low 3.5
Girishunawane, member of the AXIS OS Bug Bounty Program, has found that the VAPIX API dynamicoverlay.cgi did not have a…
-
Critical 9.8
FlowiseAI Flowise arbitrary file upload vulnerability
FlowiseAI Flowise v2.2.6 was discovered to contain an arbitrary file upload vulnerability in /api/v1/attachments.
-
Medium 6.3
shishuocms ManageUpLoadAction.java handleRequest unrestricted upload
A vulnerability has been found in shishuocms 1.1 and classified as critical. This vulnerability affects the function handleRequest of the file src/main/java/com/shishuo/cms/action/manage/ManageUpLoadAction.java. The manipulation of the argument file leads to …
-
Medium 6.3
osuuu LightPicture Api.php upload unrestricted upload
A vulnerability has been found in osuuu LightPicture 1.2.2 and classified as critical. This vulnerability affects the function upload of the file /app/controller/Api.php. The manipulation of the argument file leads to unrestricted upload. The attack can be in…
-
Medium 6.3
zj1983 zz resolve unrestricted upload
A vulnerability, which was classified as critical, was found in zj1983 zz up to 2024-8. This affects an unknown part of the file /resolve. The manipulation of the argument file leads to unrestricted upload. It is possible to initiate the attack remotely. The …
-
Medium 6.3
zj1983 zz ZfileAction.upload unrestricted upload
A vulnerability, which was classified as critical, has been found in zj1983 zz up to 2024-8. This issue affects some unknown processing of the file src/main/java/com/futvan/z/system/zfile/ZfileAction.upload. The manipulation of the argument file leads to unre…
-
Medium 6.3
Zorlan SkyCaiji Tool.php fileAction unrestricted upload
A vulnerability has been found in Zorlan SkyCaiji 2.9 and classified as critical. This vulnerability affects the function fileAction of the file vendor/skycaiji/app/admin/controller/Tool.php. The manipulation of the argument save_data leads to unrestricted up…
-
Critical 9.8
WooCommerce Ultimate Gift Card <= 2.9.2 - Unauthenticated Arbitrary File Upload
The WooCommerce Ultimate Gift Card plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'mwb_wgm_preview_mail' and 'mwb_wgm_woocommerce_add_cart_item_data' functions in all versions up to, and including,…
-
High 8.8
An issue in the CGI endpoint used to upload configurations in Draytek devices Vigor 165/166 prior to v4.2.6 , Vigor 262…
-
High 8.4
An issue in Draytek devices Vigor 165/166 prior to v4.2.6 , Vigor 2620/LTE200 prior to v3.9.8.8, Vigor 2860/2925 prior …
-
Critical 9.8
ShopXO 6.4.0 is vulnerable to File Upload in ThemeDataService.php.
-
Medium 6.5
SMA: Sunny Portal Remote Code Execution
An unauthenticated remote attacker can upload a .aspx file instead of a PV system picture through the demo account. The code can only be executed in the security context of the user.
-
Critical 9.8
An arbitrary file upload vulnerability in the component \controller\LocalTemplate.php of FoxCMS v1.2.5 allows attackers…
-
Critical 9.8
An arbitrary file upload vulnerability in the component admin\plugin.php of Emlog Pro v2.5.3 allows attackers to execut…
-
Critical 9.8
An arbitrary file upload vulnerability in the component \c\TemplateController.php of Jizhicms v2.5.4 allows attackers t…
-
Critical 9.8CVE-2025-1128 EPSS 42%
Everest Forms <= 3.0.9.4 - Unauthenticated Arbitrary File Upload, Read, and Deletion
The Everest Forms – Contact Forms, Quiz, Survey, Newsletter & Payment Form Builder for WordPress plugin for WordPress is vulnerable to arbitrary file upload, read, and deletion due to missing file type and path validation in the 'format' method of the EVF_For…
-
High 7.3
Lumsoft ERP ASPX File UploadAjaxAPI.ashx unrestricted upload
A vulnerability, which was classified as critical, has been found in Lumsoft ERP 8. Affected by this issue is some unknown functionality of the file /Api/TinyMce/UploadAjaxAPI.ashx of the component ASPX File Handler. The manipulation of the argument file lead…
-
Critical 9.8
Improper access control in the HTTP server in YI Car Dashcam v3.88 allows unrestricted file downloads, uploads, and API…
-
Medium 6.3
SourceCodester Best Church Management Software asset_crud.php unrestricted upload
A vulnerability was found in SourceCodester Best Church Management Software 1.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /admin/app/asset_crud.php. The manipulation of the argument photo1 leads …
-
Medium 4.7
SourceCodester Best Employee Management System Profile Picture unrestricted upload
A vulnerability classified as critical has been found in SourceCodester Best Employee Management System 1.0. This affects an unknown part of the file /_hr_soft/assets/uploadImage/Profile/ of the component Profile Picture Handler. The manipulation leads to unr…
-
Medium 4.7
SourceCodester E-Learning System List of Lessons Page index.php unrestricted upload
A vulnerability was found in SourceCodester E-Learning System 1.0. It has been classified as critical. Affected is an unknown function of the file /admin/modules/lesson/index.php of the component List of Lessons Page. The manipulation leads to unrestricted up…
-
Critical 10.0
WordPress Chaty Pro Plugin <= 3.3.3 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in NotFound Chaty Pro allows Upload a Web Shell to a Web Server. This issue affects Chaty Pro: from n/a through 3.3.3.
-
High 7.2CVE-2024-13869 Public exploit
Migration, Backup, Staging – WPvivid <= 0.9.112 - Authenticated (Admin+) Arbitrary File Upload via wpvivid_upload_file
The Migration, Backup, Staging – WPvivid Backup & Migration plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'upload_files' function in all versions up to, and including, 0.9.112. This makes it possible f…