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
3,436 results · Feed
-
High 8.1
Homarr is Vulnerable to Stored Cross-Site Scripting (XSS) and Possible Privilege Escalation via Malicious SVG Upload
Homarr is an open-source dashboard. Prior to version 1.43.3, stored XSS vulnerability exists, allowing the execution of arbitrary JavaScript in a user's browser, with minimal or no user interaction required, due to the rendering of a malicious uploaded SVG fi…
-
Critical 9.3
AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated Backup Upload RCE via ajaxBackupUploadFile.php
AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an unauthenticated backup upload endpoint at AudioCodes_files/ajaxBackupUploadFile.php in the F2MAdmin web interface. The script derives a backup folder path fr…
-
Critical 9.3
AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Upload RCE via ajaxScript.php
AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 include a web administration component (F2MAdmin) that exposes an unauthenticated script-management endpoint at AudioCodes_files/utils/IVR/diagram/ajaxScript.php. The …
-
Medium 6.9
AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated Prompt File Upload via ajaxPromptUploadFile.php
AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 include a web administration component (F2MAdmin) that exposes an unauthenticated prompt upload endpoint at AudioCodes_files/utils/IVR/diagram/ajaxPromptUploadFile.php…
-
Medium 6.9
eGovFramework <= 4.3.1 Unauthenticated File Upload via Web Editor Image Upload Endpoints
eGovFramework/egovframe-common-components versions up to and including 4.3.1 contain an unauthenticated file upload vulnerability via the /utl/wed/insertImage.do and /utl/wed/insertImageCk.do image upload endpoints. These controllers accept multipart requests…
-
Critical 9.8
WavePlayer < 3.8.0 - Unauthenticated Arbitrary File Upload
The WavePlayer WordPress plugin before 3.8.0 does not have authorization in an AJAX action as well as does not validate the file to be copied locally, allowing unauthenticated users to upload arbitrary file on the server and lead to RCE
-
High 8.7
Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este
Unlimited upload vulnerability for dangerous file types in WinPlus v24.11.27 from Informática del Este. This vulnerability allows an attacker to upload a 'webshell' by sending a POST request to '/WinplusPortal/ws/sWinplus.svc/json/uploadfile'.
-
High 8.8
Possible arbitrary file upload
A low privileged remote attacker can upload any file to an arbitrary location due to missing file check resulting in remote code execution.
-
High 8.8
Enable SVG, WebP, and ICO Upload <= 1.1.3 - Authenticated (Author+) Arbitrary File Upload via ICO Upload Bypass
The Enable SVG, WebP, and ICO Upload plugin for WordPress is vulnerable to arbitrary file upload in all versions up to, and including, 1.1.3. This is due to insufficient file type validation detecting ICO files, allowing double extension files with the approp…
-
High 8.8
WP Dropzone <= 1.1.0 - Authenticated (Subscriber+) Arbitrary File Upload
The WP Dropzone plugin for WordPress is vulnerable to authenticated arbitrary file upload in all versions up to, and including, 1.1.0 via the `ajax_upload_handle` function. This is due to the chunked upload functionality writing files directly to the uploads …
-
High 8.1
Pie Forms for WP <= 1.6 - Unauthenticated Arbitrary File Upload
The Pie Forms for WP plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.6 via the format_classic function. This is due to insufficient file type validation where the validate_classic method validates file exten…
-
High 8.1
Gravity Forms <= 2.9.21.1 - Unauthenticated Arbitrary File Upload via Legacy Chunked Upload
The Gravity Forms plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the legacy chunked upload mechanism in all versions up to, and including, 2.9.21.1. This is due to the extension blacklist not including .pha…
-
High 7.2
The Mozart FM Transmitter web management interface on version WEBMOZZI-00287, contains an unrestricted file upload vuln…
-
Critical 9.8
DzzOffice v2.3.7 and before is vulnerable to Arbitrary File Upload in /dzz/system/ueditor/php/controller.php.
-
Critical 9.8
The Mozart FM Transmitter web management interface on version WEBMOZZI-00287, contains an unauthenticated file upload v…
-
Medium 4.7
Iqbolshoh php-business-website about.php unrestricted upload
A security vulnerability has been detected in Iqbolshoh php-business-website up to 10677743a8dfc281f85291a27cf63a0bce043c24. This affects an unknown part of the file /admin/about.php. The manipulation leads to unrestricted upload. It is possible to initiate t…
-
High 8.8
QaTraq 6.9.2 allows authenticated users to upload arbitrary files via the "Add Attachment" feature in the "Test Script"…
-
Medium 6.3
Jiusi OA OfficeServer unrestricted upload
A security vulnerability has been detected in Jiusi OA up to 20251102. This affects an unknown function of the file /OfficeServer?isAjaxDownloadTemplate=false of the component OfficeServer Interface. Such manipulation of the argument FileData leads to unrestr…
-
Medium 6.3
Bdtask Flight Booking Software Edit Profile edit unrestricted upload
A weakness has been identified in Bdtask Flight Booking Software 4. Affected by this vulnerability is an unknown functionality of the file /agent/profile/edit of the component Edit Profile Page. This manipulation causes unrestricted upload. The attack may be …
-
Medium 4.7
DouPHP file.class.php unrestricted upload
A vulnerability has been found in DouPHP up to 1.8 Release 20251022. This impacts an unknown function of the file upload/include/file.class.php. The manipulation of the argument File leads to unrestricted upload. Remote exploitation of the attack is possible.…
-
Medium 4.7
Bdtask/CodeCanyon News365 profile unrestricted upload
A security flaw has been discovered in Bdtask/CodeCanyon News365 up to 7.0.3. This affects an unknown function of the file /admin/dashboard/profile. The manipulation of the argument profile_image/banner_image results in unrestricted upload. The attack can be …
-
Medium 6.8
A vulnerability was found in Alaga Home Security WiFi Camera 3K (model S-CW2503C-H) with hardware version V03 and firmw…
-
Medium 6.3
itsourcecode Online Voting System index.php unrestricted upload
A vulnerability was detected in itsourcecode Online Voting System 1.0. This impacts an unknown function of the file /index.php?page=manage_voting. Performing manipulation results in unrestricted upload. The attack is possible to be carried out remotely. The e…
-
High 7.5
An arbitrary file upload vulnerability was reported in the Lenovo Scanner Pro client during an internal security assess…
-
High 7.3
Apache OFBiz: Critical Remote Command Execution via Unrestricted File Upload
Unrestricted Upload of File with Dangerous Type vulnerability in Apache OFBiz. This issue affects Apache OFBiz: before 24.09.03. Users are recommended to upgrade to version 24.09.03, which fixes the issue.
-
Low 2.0
Unrestricted upload of file with dangerous type for some Intel(R) CIP software before version WIN_DCA_2.4.0.11001 withi…
-
High 8.8
Blocksy Companion <= 2.1.19 - Authenticated (Author+) Arbitrary File Upload via SVG Upload Bypass
The Blocksy Companion plugin for WordPress is vulnerable to authenticated arbitrary file upload in all versions up to, and including, 2.1.19. This is due to insufficient file type validation detecting SVG files, allowing double extension files to bypass sanit…
-
Critical 9.8CVE-2025-11170 Public exploit
WP移行専用プラグイン for CPI <= 1.0.2 - Unauthenticated Arbitrary File Upload
The WP移行専用プラグイン for CPI plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the Cpiwm_Import_Controller::import function in all versions up to, and including, 1.0.2. This makes it possible for unauthenticated at…
-
Low 2.7
Insecure File Operations vulnerability in SAP NetWeaver Application Server for ABAP (Migration Workbench)
Migration Workbench (DX Workbench) in SAP NetWeaver Application Server for ABAP fails to trigger a malware scan when an attacker with administrative privileges uploads files to the application server. An attacker could leverage this and upload a malicious fil…
-
Critical 9.3CVE-2021-4462 Scanner template
Employee Records System v1.0 Arbitrary File Upload RCE
Employee Records System version 1.0 contains an unrestricted file upload vulnerability that allows a remote unauthenticated attacker to upload arbitrary files via the uploadID.php endpoint; uploaded files can be executed because the application does not perfo…
-
High 7.2
Hundred Plus｜EIP Plus - Arbitrary File Uplaod
EIP Plus developed by Hundred Plus has an Arbitrary File Uplaod vulnerability, allowing privileged remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
-
Low 3.8
An authenticated arbitrary file upload vulnerability in the /uploads/ endpoint of CMS Made Simple Foundation File Manag…
-
High 7.2
Mail Mint <= 1.18.10 - Authenticated (Admin+) Arbitrary File Upload
The Mail Mint plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the process_contact_attribute_import function in all versions up to, and including, 1.18.10. This makes it possible for authenticated attackers, …
-
High 7.2CVE-2025-12399 Public exploit
Alex Reservations: Smart Restaurant Booking <= 2.2.3 - Authenticated (Admin+) Arbitrary File Upload
The Alex Reservations: Smart Restaurant Booking plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the /wp-json/srr/v1/app/upload/file REST endpoint in all versions up to, and including, 2.2.3. This makes it po…
-
High 8.8
Smart Auto Upload Images <= 1.2.0 - Authenticated (Contributor+) Arbitrary File Upload
The Smart Auto Upload Images plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the auto-image creation functionality in all versions up to, and including, 1.2.0. This makes it possible for authenticated attack…
-
Medium 6.3
projectworlds Online Notes Sharing Platform userprofile.php unrestricted upload
A vulnerability was identified in projectworlds Online Notes Sharing Platform 1.0. Affected by this issue is some unknown functionality of the file /dashboard/userprofile.php. Such manipulation of the argument image leads to unrestricted upload. The attack ma…
-
Critical 9.3
Monsta FTP <= 2.11 Unauthenticated Arbitrary File Upload
Monsta FTP versions 2.11 and earlier contain a vulnerability that allows unauthenticated arbitrary file uploads. This flaw enables attackers to execute arbitrary code by uploading a specially crafted file from a malicious (S)FTP server.
-
Critical 9.8
Gravity Forms <= 2.9.20 - Unauthenticated Arbitrary File Upload via 'copy_post_image'
The Gravity Forms plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the copy_post_image() function in all versions up to, and including, 2.9.20. This makes it possible for unauthenticated attackers to upload a…
-
Medium 5.3
ThinkDashboard: Arbitrary File Upload vulnerability in the Backup Import Feature
ThinkDashboard is a self-hosted bookmark dashboard built with Go and vanilla JavaScript. In versions 0.6.7 and below, an attacker can upload any file they wish to the /data directory of the web application via the backup import feature. When importing a backu…
-
Critical 10.0
WordPress King Addons for Elementor plugin <= 51.1.36 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in KingAddons.com King Addons for Elementor king-addons allows Upload a Web Shell to a Web Server.This issue affects King Addons for Elementor: from n/a through <= 51.1.36.