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
220 results · Clear filters · Feed
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Critical 9.8CVE-2025-10147 Public exploit
Podlove Podcast Publisher <= 4.2.6 - Unauthenticated Arbitrary File Upload
The Podlove Podcast Publisher plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'move_as_original_file' function in all versions up to, and including, 4.2.6. This makes it possible for unauthenticated atta…
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Critical 9.3CVE-2009-20006 Public exploit
osCommerce <= 2.2 Admin File Manager Arbitrary PHP Code Execution
osCommerce versions up to and including 2.2 RC2a contain a vulnerability in its administrative file manager utility (admin/file_manager.php). The interface allows file uploads and edits without sufficient input validation or access control. An unauthenticated…
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Critical 10.0CVE-2009-20011 Public exploit
ContentKeeper Web Appliance < 125.10 RCE via mimencode
ContentKeeper Web Appliance (now maintained by Impero Software) versions prior to 125.10 are vulnerable to remote command execution due to insecure handling of file uploads via the mimencode CGI utility. The vulnerability allows unauthenticated attackers to u…
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Critical 9.3
Directus allows unauthenticated file upload and file modification due to lacking input sanitization
Directus is a real-time API and App dashboard for managing SQL database content. From 10.8.0 to before 11.9.3, a vulnerability exists in the file update mechanism which allows an unauthenticated actor to modify existing files with arbitrary contents (without …
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Critical 10.0
WordPress StoreKeeper for WooCommerce Plugin <= 14.4.4 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in StoreKeeper B.V. StoreKeeper for WooCommerce storekeeper-for-woocommerce allows Using Malicious Files.This issue affects StoreKeeper for WooCommerce: from n/a through <= 14.4.4.
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Critical 9.1CVE-2025-54677 Public exploit
WordPress Online Booking & Scheduling Calendar for WordPress by vcita Plugin <= 4.5.3 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in vcita Online Booking & Scheduling Calendar for WordPress by vcita meeting-scheduler-by-vcita allows Using Malicious Files.This issue affects Online Booking & Scheduling Calendar for WordPress by…
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Critical 9.8
StoryChief <= 1.0.42 - Unauthenticated Arbitrary File Upload
The StoryChief plugin for WordPress is vulnerable to arbitrary file uploads in all versions up to, and including, 1.0.42. This vulnerability occurs through the /wp-json/storychief/webhook REST-API endpoint that does not have sufficient filetype validation. Th…
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Critical 9.3CVE-2012-10054 Public exploit
Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE
Umbraco CMS versions prior to 4.7.1 are vulnerable to unauthenticated remote code execution via the codeEditorSave.asmx SOAP endpoint, which exposes a SaveDLRScript operation that permits arbitrary file uploads without authentication. By exploiting a path tra…
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Critical 9.3CVE-2012-10038 Public exploit
Auxilium RateMyPet Arbitrary File Upload RCE
Auxilium RateMyPet contains an unauthenticated arbitrary file upload vulnerability in upload_banners.php. The banner upload feature fails to validate file types or enforce authentication, allowing remote attackers to upload malicious PHP files. These files ar…
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Critical 9.3CVE-2012-10045 Public exploit
XODA 0.4.5 Arbitrary PHP File Upload
XODA version 0.4.5 contains an unauthenticated file upload vulnerability that allows remote attackers to execute arbitrary PHP code on the server. The flaw resides in the upload functionality, which fails to properly validate or restrict uploaded file types. …
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Critical 9.3CVE-2012-10049 Public exploit
WebPageTest Arbitrary PHP File Upload RCE
WebPageTest version 2.6 and earlier contains an arbitrary file upload vulnerability in the resultimage.php script. The application fails to validate or sanitize user-supplied input before saving uploaded files to a publicly accessible directory. This flaw all…
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Critical 9.3CVE-2012-10036 Public exploit
Project Pier <= 0.8.8 Arbitrary File Upload RCE
Project Pier 0.8.8 and earlier contains an unauthenticated arbitrary file upload vulnerability in tools/upload_file.php. The upload handler fails to validate the file type or enforce authentication, allowing remote attackers to upload malicious PHP files dire…
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Critical 10.0CVE-2012-10044 Public exploit
MobileCartly 1.0 savepage.php Arbitrary File Creation
MobileCartly version 1.0 contains an arbitrary file creation vulnerability in the savepage.php script. The application fails to perform authentication or authorization checks before invoking file_put_contents() on attacker-controlled input. An unauthenticated…
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Critical 9.3CVE-2012-10052 Public exploit
EGallery 1.2 Arbitrary PHP File Upload
EGallery version 1.2 contains an unauthenticated arbitrary file upload vulnerability in the uploadify.php script. The application fails to validate file types or enforce authentication, allowing remote attackers to upload malicious PHP files directly into the…
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Critical 9.3CVE-2012-10050 Public exploit
CuteFlow <= 2.11.2 Arbitrary File Upload RCE
CuteFlow version 2.11.2 and earlier contains an arbitrary file upload vulnerability in the restart_circulation_values_write.php script. The application fails to validate or restrict uploaded file types, allowing unauthenticated attackers to upload arbitrary P…
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Critical 9.3CVE-2012-10027 Public exploit
WordPress Plugin WP-Property <= 1.35.0 PHP File Upload
WP-Property plugin for WordPress up to and including version 1.35.0 contains an unauthenticated file upload vulnerability in the third-party `uploadify.php` script. A remote attacker can upload arbitrary PHP files to a temporary directory without authenticati…
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Critical 10.0CVE-2012-10026 Public exploit
WordPress Plugin Asset-Manager <= 2.0 PHP File Upload
The WordPress plugin Asset-Manager version 2.0 and below contains an unauthenticated arbitrary file upload vulnerability in upload.php. The endpoint fails to properly validate and restrict uploaded file types, allowing remote attackers to upload malicious PHP…
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Critical 10.0CVE-2013-10066 Public exploit
Kordil EDMS v2.2.60rc3 Unauthenticated Arbitrary File Upload
An unauthenticated arbitrary file upload vulnerability exists in Kordil EDMS v2.2.60rc3. The application exposes an upload endpoint (users_add.php) that allows attackers to upload files to the /userpictures/ directory without authentication. This flaw enables…
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Critical 9.4CVE-2013-10067 Public exploit
Glossword 1.8.8 - 1.8.12 Arbitrary File Upload RCE
Glossword versions 1.8.8 through 1.8.12 contain an authenticated arbitrary file upload vulnerability. When deployed as a standalone application, the administrative interface (gw_admin.php) allows users with administrator privileges to upload files to the gw_t…
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Critical 9.3CVE-2012-10030 Public exploit
FreeFloat FTP Server Arbitrary File Upload
FreeFloat FTP Server contains multiple critical design flaws that allow unauthenticated remote attackers to upload arbitrary files to sensitive system directories. The server accepts empty credentials, defaults user access to the root of the C:\ drive, and im…
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Critical 9.3CVE-2014-125113 Public exploit
Dell/Quest KACE K1000 Unauthenticated File Upload RCE
An unrestricted file upload vulnerability exists in Dell (acquired by Quest) KACE K1000 System Management Appliance version 5.0 - 5.3, 5.4 prior to 5.4.76849, and 5.5 prior to 5.5.90547 in the download_agent.php endpoint. An attacker can upload arbitrary PHP …
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Critical 9.3CVE-2013-10054 Public exploit
LibrettoCMS File Manager Arbitrary File Upload
An unauthenticated arbitrary file upload vulnerability exists in LibrettoCMS version 1.1.7 (and possibly earlier) contains an unauthenticated arbitrary file upload vulnerability in its File Manager plugin. The upload handler located at adm/ui/js/ckeditor/plug…
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Critical 9.3CVE-2013-10047 Public exploit
MiniWeb <= Build 300 Arbitrary File Upload
An unrestricted file upload vulnerability exists in MiniWeb HTTP Server <= Build 300 that allows unauthenticated remote attackers to upload arbitrary files to the server’s filesystem. By abusing the upload handler and crafting a traversal path, an attacker ca…
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Critical 9.3CVE-2013-10055 Public exploit
Havalite CMS Arbitary File Upload RCE
An unauthenticated arbitrary file upload vulnerability exists in Havalite CMS version 1.1.7 (and possibly earlier) in the upload.php script. The application fails to enforce proper file extension validation and authentication checks, allowing remote attackers…
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Critical 9.2CVE-2014-125126 Public exploit
Simple E-Document Arbitrary File Upload RCE
An unrestricted file upload vulnerability exists in Simple E-Document versions 3.0 to 3.1 that allows an unauthenticated attacker to bypass authentication by sending a specific cookie header (access=3) with HTTP requests. The application’s upload mechanism fa…
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Critical 9.3CVE-2013-10034 Public exploit
Kaseya < 6.3.0.2 uploadImage.asp Arbitrary File Upload RCE
An unrestricted file upload vulnerability exists in Kaseya KServer versions prior to 6.3.0.2. The uploadImage.asp endpoint allows unauthenticated users to upload files to arbitrary paths via a crafted filename parameter in a multipart/form-data POST request. …
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Critical 9.3CVE-2013-10038 Public exploit
FlashChat Arbitrary File Upload RCE
An unauthenticated arbitrary file upload vulnerability exists in FlashChat versions 6.0.2 and 6.0.4 through 6.0.8. The upload.php endpoint fails to properly validate file types and authentication, allowing attackers to upload malicious PHP scripts. Once uploa…
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Critical 10.0CVE-2013-10040 Public exploit
ClipBucket <= 2.6 ofc_upload_image.php Arbitrary File Upload RCE
ClipBucket version 2.6 and earlier contains a critical vulnerability in the ofc_upload_image.php script located at /admin_area/charts/ofc-library/. This endpoint allows unauthenticated users to upload arbitrary files, including executable PHP scripts. Once up…
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Critical 9.5CVE-2013-10043 Public exploit
Astium VOIP PBX <= 2.1 SQL Injection File Upload RCE
A vulnerability exists in OAstium VoIP PBX astium-confweb-2.1-25399 and earlier, where improper input validation in the logon.php script allows an attacker to bypass authentication via SQL injection. Once authenticated as an administrator, the attacker can up…
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Critical 9.3CVE-2014-125116 Public exploit
HybridAuth 2.0.9 - 2.2.2 Unauthenticated RCE via install.php Configuration Injection
A remote code execution vulnerability exists in HybridAuth versions 2.0.9 through 2.2.2 due to insecure use of the install.php installation script. The script remains accessible after deployment and fails to sanitize input before writing to the application’s …
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Critical 10.0CVE-2025-5243 Public exploit
Arbitrary File Upload in SMG Software's Information Portal
Unrestricted Upload of File with Dangerous Type, Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in SMG Software Information Portal allows Code Injection, Upload a Web Shell to a Web Server, Code Inclus…
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Critical 9.3
osCommerce 2.3.4.1 Installer Unauthenticated Configuration File Injection PHP Code Execution
A remote code execution vulnerability exists within osCommerce Online Merchant version 2.3.4.1 due to insecure default configuration and missing authentication in the installer workflow. By default, the /install/ directory remains accessible after installatio…
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Critical 9.8CVE-2012-10020 Public exploit
FoxyPress <= 0.4.2.1 - Arbitrary File Upload
The FoxyPress plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the uploadify.php file in versions up to, and including, 0.4.2.1. This makes it possible for unauthenticated attackers to upload arbitrary files …
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Critical 9.8CVE-2015-10137 Public exploit
Website Contact Form With File Upload <= 1.3.4 - Arbitrary File Upload
The Website Contact Form With File Upload plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'upload_file()' function in versions up to, and including, 1.3.4. This makes it possible for unauthenticated atta…
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Critical 9.8CVE-2015-10138 Public exploit
Work The Flow File Upload <= 2.5.2 - Arbitrary File Upload
The Work The Flow File Upload plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the jQuery-File-Upload-9.5.0 server and test files in versions up to, and including, 2.5.2. This makes it possible for unauthenti…
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Critical 9.8CVE-2015-10135 Public exploit
WPshop 2 – E-Commerce < 1.3.9.6 - Arbitrary File Upload
The WPshop 2 – E-Commerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the ajaxUpload function in versions before 1.3.9.6. This makes it possible for unauthenticated attackers to upload arbitrary files on…
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Critical 9.8CVE-2012-10019 Public exploit
Front-end Editor < 2.3 - Arbitrary File Upload
The Front End Editor plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation via the upload.php file in versions before 2.3. This makes it possible for unauthenticated attackers to upload arbitrary files on the affecte…
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Critical 9.8
WP Mobile Detector <= 3.5 - Arbitrary File Upload
The WP Mobile Detector plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in resize.php file in versions up to, and including, 3.5. This makes it possible for unauthenticated attackers to upload arbitrary files on…
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Critical 9.3CVE-2025-34121 Public exploit
Idera Up.Time ≤ 7.2 post2file.php Arbitrary File Upload RCE
An unauthenticated arbitrary file upload vulnerability exists in Idera Up.Time Monitoring Station versions up to and including 7.2. The `wizards/post2file.php` script accepts arbitrary POST parameters, allowing attackers to upload crafted PHP files to the web…
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Critical 10.0CVE-2025-29009 Public exploit
WordPress Medical Prescription Attachment Plugin for WooCommerce <= 1.2.3 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Webkul Medical Prescription Attachment Plugin for WooCommerce medical-prescription-attachment-plugin-for-woocommerce allows Upload a Web Shell to a Web Server.This issue affects Medical Prescrip…