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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Critical 9.9
WordPress RTMKit plugin <= 1.6.5 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Rometheme RTMKit rometheme-for-elementor.This issue affects RTMKit: from n/a through <= 1.6.5.
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Critical 9.9
WordPress Case Addons plugin < 1.3.0 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Case-Themes Case Addons case-addons.This issue affects Case Addons: from n/a through < 1.3.0.
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Critical 9.9
WordPress Kallyas theme <= 4.22.0 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in hogash KALLYAS kallyas.This issue affects KALLYAS: from n/a through <= 4.22.0.
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Critical 10.0
WordPress Support Ticket System for WooCommerce plugin <= 2.0.7 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Plugify Support Ticket System for WooCommerce (Premium) support-ticket-system-for-woocommerce allows Using Malicious Files.This issue affects Support Ticket System for WooCommerce (Premium): fro…
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Critical 10.0
WordPress Custom User Registration Fields for WooCommerce plugin <= 2.1.2 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Addify Custom User Registration Fields for WooCommerce user-registration-plugin-for-woocommerce allows Upload a Web Shell to a Web Server.This issue affects Custom User Registration Fields for W…
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Medium 4.8
WordPress Atarim plugin <= 4.2.1 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Vito Peleg Atarim atarim-visual-collaboration allows Using Malicious Files.This issue affects Atarim: from n/a through <= 4.2.1.
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Critical 9.1
WordPress Advanced Settings Plugin <= 3.1.1 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Helmut Wandl Advanced Settings advanced-settings allows Upload a Web Shell to a Web Server.This issue affects Advanced Settings: from n/a through <= 3.1.1.
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Critical 10.0
WordPress Drop Uploader for CF7 - Drag&Drop File Uploader Addon Plugin <= 2.4.1 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in borisolhor Drop Uploader for CF7 - Drag&Drop File Uploader Addon drop-uploader-for-contact-form-7-dragdrop-file-uploader-addon allows Upload a Web Shell to a Web Server.This issue affects Drop U…
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High 8.4
Authenticated Arbitrary File Upload in Multiple WSO2 Products via SOAP Admin Services Leading to Remote Code Execution
An arbitrary file upload vulnerability exists in multiple WSO2 products due to insufficient validation of uploaded content and destination in SOAP admin services. A malicious actor with administrative privileges can upload a specially crafted file to a user-c…
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Medium 6.5
Cisco Unified Contact Center Express Arbitrary File Upload Vulnerability
A vulnerability in the web UI of Cisco Unified CCX could allow an authenticated, remote attacker to upload and execute arbitrary files. This vulnerability is due to an insufficient input validation associated to specific UI features. An attacker could exploit…
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Medium 6.5
Cisco Unified Contact Center Express Remote Code Execution Vulnerability
A vulnerability in the web UI of Cisco Unified CCX could allow an authenticated, remote attacker to upload and execute arbitrary files. This vulnerability is due to an insufficient input validation associated to file upload mechanisms. An attacker could explo…
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Critical 9.8
Cisco Unified Contact Center Express Remote Code Execution Vulnerability
A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an unauthenticated, remote attacker to upload arbitrary files and execute arbitrary commands with root permissions on an affected system. This vulnerability is…
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Medium 6.7
Authenticated Arbitrary File Upload in Multiple WSO2 Products via CarbonAppUploader Admin Service Leading to Remote Code Execution
An arbitrary file upload vulnerability exists in multiple WSO2 products due to improper input validation in the CarbonAppUploader admin service endpoint. An authenticated attacker with appropriate privileges can upload a malicious file to a user-controlled lo…
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Critical 9.8CVE-2025-12674 Public exploit
KiotViet Sync <= 1.8.5 - Unauthenticated Arbitrary File Upload
The KiotViet Sync plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the create_media() function in all versions up to, and including, 1.8.5. This makes it possible for unauthenticated attackers to upload arbit…
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Critical 9.9
Snipe-IT before version 8.3.3 contains a remote code execution vulnerability that allows an authenticated attacker to u…
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Critical 9.8
Easy Upload Files During Checkout <= 2.9.8 - Unauthenticated Arbitrary JavaScript File Upload
The Easy Upload Files During Checkout plugin for WordPress is vulnerable to arbitrary JavaScript file uploads due to missing file type validation in the 'file_during_checkout' function in all versions up to, and including, 2.9.8. This makes it possible for un…
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High 8.8
EM Beer Manager <= 3.2.3 - Authenticated (Subscriber+) Arbitrary File Upload
The EM Beer Manager plugin for WordPress is vulnerable to arbitrary file upload leading to remote code execution in all versions up to, and including, 3.2.3. This is due to missing file type validation in the EMBM_Admin_Untappd_Import_image() function and mis…
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High 8.3
Arbitrary code execution is possible due to improper validation of the file upload functionality in Eaton BLSS. This se…
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Medium 4.7
code-projects Simple Online Hotel Reservation System Photo edit_room.php unrestricted upload
A vulnerability was identified in code-projects Simple Online Hotel Reservation System 2.0. The impacted element is an unknown function of the file /admin/edit_room.php of the component Photo Handler. The manipulation leads to unrestricted upload. The attack …
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High 8.8
Delicious Recipes <= 1.9.0 - Authenticated (Contributor+) Arbitrary File Upload
The WP Delicious – Recipe Plugin for Food Bloggers (formerly Delicious Recipes) plugin for WordPress is vulnerable to arbitrary file uploads when importing recipes via CSV in all versions up to, and including, 1.9.0. This flaw allows an attacker with at least…
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High 8.8
RESTful Content Syndication 1.1.0 - 1.5.0 - Authenticated (Contributor+) Arbitrary File Upload
The RESTful Content Syndication plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the ingest_image() function in versions 1.1.0 to 1.5.0. This makes it possible for authenticated attackers, with Author-level a…
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Critical 9.8
Tablesome Table – Contact Form DB – WPForms, CF7, Gravity, Forminator, Fluent <= 1.1.32 - Unauthenticated Arbitrary File Upload
The Tablesome Table – Contact Form DB – WPForms, CF7, Gravity, Forminator, Fluent plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the set_featured_image_from_external_url() function in all versions up to, an…
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High 8.0
ELOG file upload stored XSS
ELOG allows an authenticated user to upload arbitrary HTML files. The HTML content is executed in the context of other users when they open the file. Because ELOG includes usernames and password hashes in certain HTTP requests, an attacker can obtain the targ…
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High 8.7
Nagios XI < 5.7.2 Unrestricted File Upload via Audio Import Directory
Nagios XI versions prior to 5.7.2 allow PHP files to be uploaded to the Audio Import directory and executed from that location. The upload handler did not properly restrict file types or enforce storage outside of the webroot, and the web server permitted exe…
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Critical 10.0
DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to 10.1.1, the default HTML editor provider allows unauthenticated file uploads and images can overwrite existing files. An unauthenticated use…
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Medium 4.3
DNN CKEditor Provider allows unauthenticated upload out-of-the-box
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to 10.1.1, the out-of-box experience for HTML editing allows unauthenticated users to upload files. This opens a potential vector to other secu…
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High 7.3
code-projects Simple Food Ordering System addproduct.php unrestricted upload
A security flaw has been discovered in code-projects Simple Food Ordering System 1.0. This issue affects some unknown processing of the file /addproduct.php. Performing manipulation of the argument photo results in unrestricted upload. The attack may be initi…
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Medium 6.3
MaxSite CMS save-file-ajax.php unrestricted upload
A flaw has been found in MaxSite CMS up to 109. This issue affects some unknown processing of the file application/maxsite/admin/plugins/editor_files/save-file-ajax.php. Executing manipulation of the argument file_path/content can lead to unrestricted upload.…
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Medium 6.3
MaxSite CMS HTTP Header uploads-require-maxsite.php unrestricted upload
A vulnerability was detected in MaxSite CMS up to 109. This vulnerability affects unknown code of the file application/maxsite/admin/plugins/auto_post/uploads-require-maxsite.php of the component HTTP Header Handler. Performing manipulation of the argument X-…
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Medium 6.3
Yonyou U8 Cloud Request Header NCloudGatewayServlet unrestricted upload
A vulnerability has been found in Yonyou U8 Cloud up to 5.1sp. The impacted element is an unknown function of the file /service/NCloudGatewayServlet of the component Request Header Handler. Such manipulation of the argument ts/sign leads to unrestricted uploa…
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Medium 4.7
Willow CMS add unrestricted upload
A weakness has been identified in Willow CMS up to 1.4.0. Impacted is an unknown function of the file /admin/images/add. This manipulation causes unrestricted upload. Remote exploitation of the attack is possible. The exploit has been made available to the pu…
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High 7.3
code-projects Simple Food Ordering System editproduct.php unrestricted upload
A security vulnerability has been detected in code-projects Simple Food Ordering System 1.0. Impacted is an unknown function of the file /editproduct.php. Such manipulation of the argument photo leads to unrestricted upload. The attack can be launched remotel…
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Medium 4.7
ashymuzuro Full-Ecommece-Website/Muzuro Ecommerce System Add Product index.php unrestricted upload
A vulnerability was found in ashymuzuro Full-Ecommece-Website and Muzuro Ecommerce System up to 1.1.0. This affects an unknown part of the file /admin/index.php?add_product of the component Add Product Page. The manipulation results in unrestricted upload. Th…
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Medium 6.3
LearnHouse Course Thumbnail courses unrestricted upload
A vulnerability has been found in LearnHouse up to 98dfad76aad70711a8113f6c1fdabfccf10509ca. Impacted is an unknown function of the file /api/v1/courses/ of the component Course Thumbnail Handler. The manipulation of the argument thumbnail leads to unrestrict…
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Medium 6.3
Bdtask Flight Booking Software Package Information package-information unrestricted upload
A vulnerability was detected in Bdtask Flight Booking Software up to 3.1. This affects an unknown part of the file /b2c/package-information of the component Package Information Module. The manipulation results in unrestricted upload. The attack can be launche…
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Medium 6.3
Bdtask Flight Booking Software Deposit deposit unrestricted upload
A security vulnerability has been detected in Bdtask Flight Booking Software up to 3.1. Affected by this issue is some unknown functionality of the file /admin/transaction/deposit of the component Deposit Handler. The manipulation leads to unrestricted upload…
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Medium 4.7
ajayrandhawa User-Management-PHP-MYSQL User Management edit-user.php unrestricted upload
A vulnerability was identified in ajayrandhawa User-Management-PHP-MYSQL up to fedcf58797bf2791591606f7b61fdad99ad8bff1. This affects an unknown part of the file /admin/edit-user.php of the component User Management Interface. Such manipulation of the argumen…
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High 7.2
AIO Forms <= 1.3.18 - Authenticated (Admin+) Arbitrary File Upload via Zip Import
The AIO Forms – Craft Complex Forms Easily plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the import functionality in all versions up to, and including, 1.3.18. This makes it possible for authenticated atta…
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Critical 9.8
WooCommerce Designer Pro <= 1.9.26 - Unauthenticated Arbitrary File Upload
The WooCommerce Designer Pro plugin for WordPress, used by the Pricom - Printing Company & Design Services WordPress theme, is vulnerable to arbitrary file uploads due to missing file type validation in the 'wcdp_save_canvas_design_ajax' function in all versi…
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High 7.6
PerfreeBlog v4.0.11 has a File Upload vulnerability in the installTheme function