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
936 results · Clear filters · Feed
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Medium 6.3
D-Link DAR-7000-40 licenseauthorization.php unrestricted upload
** UNSUPPORTED WHEN ASSIGNED ** A vulnerability classified as critical has been found in D-Link DAR-7000-40 V31R02B1413C. Affected is an unknown function of the file interface/sysmanage/licenseauthorization.php. The manipulation of the argument file_upload le…
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Medium 6.3
SourceCodester Online Art Gallery Management System adminHome.php unrestricted upload
A vulnerability was found in SourceCodester Online Art Gallery Management System 1.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file admin/adminHome.php. The manipulation of the argument sliderpic lead…
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Medium 4.3
SourceCodester Best Courier Management System view_parcel.php unrestricted upload
A vulnerability was found in SourceCodester Best Courier Management System 1.0. It has been classified as problematic. Affected is an unknown function of the file view_parcel.php. The manipulation of the argument id leads to unrestricted upload. It is possibl…
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Medium 6.3
Codezips E-Commerce Site addproduct.php unrestricted upload
A vulnerability has been found in Codezips E-Commerce Site 1.0 and classified as critical. This vulnerability affects unknown code of the file admin/addproduct.php. The manipulation of the argument profilepic leads to unrestricted upload. The attack can be in…
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Medium 6.3
SourceCodester Employee and Visitor Gate Pass Logging System unrestricted upload
A vulnerability classified as critical has been found in SourceCodester Employee and Visitor Gate Pass Logging System 1.0. Affected is an unknown function of the file /employee_gatepass/classes/Users.php?f=ssave. The manipulation of the argument img leads to …
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Medium —
Drupal Malicious file upload with filenames stating with dot
Drupal 8 core's file_save_upload() function does not strip the leading and trailing dot ('.') from filenames, like Drupal 7 did. Users with the ability to upload files with any extension in conjunction with contributed modules may be able to use this to uploa…
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Medium 6.6
Drupal core unrestricted file upload
Drupal 8 core's file_save_upload() function does not strip the leading and trailing dot ('.') from filenames, like Drupal 7 did. Users with the ability to upload files with any extension in conjunction with contributed modules may be able to use this to uploa…
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Medium 6.3
Byzoro Smart S200 Management Platform userattestation.php unrestricted upload
A vulnerability was found in Byzoro Smart S200 Management Platform up to 20240507. It has been rated as critical. This issue affects some unknown processing of the file /useratte/userattestation.php. The manipulation of the argument web_img leads to unrestric…
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Medium 5.7
NocoDB Allows Preview of File with Dangerous Content
NocoDB is software for building databases as spreadsheets. Starting in verson 0.202.6 and prior to version 0.202.10, an attacker can upload a html file with malicious content. If user tries to open that file in browser malicious scripts can be executed leadin…
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Medium 6.3
SourceCodester Online Computer and Laptop Store unrestricted upload
A vulnerability was found in SourceCodester Online Computer and Laptop Store 1.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /classes/SystemSettings.php?f=update_settings. The manipulation leads to…
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Medium 6.3
SourceCodester Open Source Clinic Management System setting.php unrestricted upload
A vulnerability has been found in SourceCodester Open Source Clinic Management System 1.0 and classified as critical. Affected by this vulnerability is an unknown functionality of the file setting.php. The manipulation of the argument logo leads to unrestrict…
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Medium 4.7
Campcodes Legal Case Management System Setting general-setting unrestricted upload
A vulnerability, which was classified as critical, was found in Campcodes Legal Case Management System 1.0. Affected is an unknown function of the file /admin/general-setting of the component Setting Handler. The manipulation of the argument favicon/logo lead…
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Medium 6.3
An arbitrary file upload vulnerability exists in emlog pro 2.3.0 and pro 2.3.2 at admin/views/plugin.php that could be …
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Medium 6.3
SourceCodester Prison Management System edit-photo.php unrestricted upload
A vulnerability was found in SourceCodester Prison Management System 1.0. It has been declared as critical. This vulnerability affects unknown code of the file /Employee/edit-photo.php. The manipulation of the argument userImage leads to unrestricted upload. …
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Medium 6.5
Triangle MicroWorks SCADA Data Gateway Workspace Unrestricted Upload Vulnerability
Triangle MicroWorks SCADA Data Gateway Workspace Unrestricted Upload Vulnerability. This vulnerability allows remote attackers to upload arbitrary files on affected installations of Triangle MicroWorks SCADA Data Gateway. Although authentication is required t…
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Medium 4.3
Bzip2: compressed content bomb leads to denial of service of bombastic api
A flaw was found in Bombastic, which allows authenticated users to upload compressed (bzip2 or zstd) SBOMs. The API endpoint verifies the presence of some fields and values in the JSON. To perform this verification, the uploaded file must first be decompresse…
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Medium 6.3
File Upload vulnerability in the function for employees to upload avatars in Code-Projects Simple School Management Sys…
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Medium 5.3
Forminator prior to 1.29.0 contains an unrestricted upload of file with dangerous type vulnerability. If this vulnerabi…
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Medium 6.5
An arbitrary file upload vulnerability in the file handling module of moziloCMS v2.0 allows attackers to bypass extensi…
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Medium 6.3
SourceCodester Home Clean Service System Photo student.add.php unrestricted upload
A vulnerability was found in SourceCodester Home Clean Service System 1.0. It has been rated as critical. Affected by this issue is some unknown functionality of the file \admin\student.add.php of the component Photo Handler. The manipulation leads to unrestr…
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Medium 6.3
Vesystem Cloud Desktop fileupload2.php unrestricted upload
A vulnerability, which was classified as critical, has been found in Vesystem Cloud Desktop up to 20240408. This issue affects some unknown processing of the file /Public/webuploader/0.1.5/server/fileupload2.php. The manipulation of the argument file leads to…
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Medium 6.3
Vesystem Cloud Desktop fileupload.php unrestricted upload
A vulnerability classified as critical was found in Vesystem Cloud Desktop up to 20240408. This vulnerability affects unknown code of the file /Public/webuploader/0.1.5/server/fileupload.php. The manipulation of the argument file leads to unrestricted upload.…
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Medium 4.3
cym1102 nginxWebUI upload unrestricted upload
A vulnerability was found in cym1102 nginxWebUI up to 3.9.9. It has been declared as problematic. Affected by this vulnerability is the function upload of the file /adminPage/main/upload. The manipulation leads to unrestricted upload. The attack can be launch…
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Medium 6.4
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE <= 2.6.8 - Authenticated (Author+) Limited File Upload to Stored Cross-Site Scripting
The Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG file upload in all versions up to, and including, 2.6.8 due to insufficient input sanitization and output es…
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Medium 4.7
Byzoro Smart S80 Management Platform userattestation.php unrestricted upload
A vulnerability was found in Byzoro Smart S80 Management Platform up to 20240317. It has been rated as critical. Affected by this issue is some unknown functionality of the file /useratte/userattestation.php. The manipulation of the argument web_img leads to …
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Medium 6.4
Template Kit – Import <= 1.0.14 - Authenticated(Author+) Stored Cross-Site Scripting via template upload
The Template Kit – Import plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the template upload functionality in all versions up to, and including, 1.0.14 due to insufficient input sanitization and output escaping. This makes it possible f…
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Medium 6.5
PsiTransfer file integrity violation vulnerability
PsiTransfer is an open source, self-hosted file sharing solution. Prior to version 2.2.0, the absence of restrictions on the endpoint, which is designed for uploading files, allows an attacker who received the id of a file distribution to change the files tha…
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Medium 6.5
PsiTransfer vulnerable to violation of the integrity of file distribution
PsiTransfer is an open source, self-hosted file sharing solution. Prior to version 2.2.0, the absence of restrictions on the endpoint, which allows users to create a path for uploading a file in a file distribution, allows an attacker to add arbitrary files t…
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Medium 4.7
Wangshen SecGate 3600 ?g=net_pro_keyword_import_save unrestricted upload
A vulnerability was found in Wangshen SecGate 3600 up to 20240408. It has been classified as critical. This affects an unknown part of the file /?g=net_pro_keyword_import_save. The manipulation of the argument reqfile leads to unrestricted upload. It is possi…
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Medium 6.3
SourceCodester Prison Management System Avatar edit-photo.php unrestricted upload
A vulnerability was found in SourceCodester Prison Management System 1.0. It has been declared as critical. This vulnerability affects unknown code of the file /Admin/edit-photo.php of the component Avatar Handler. The manipulation of the argument avatar lead…
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Medium 6.3
code-projects Car Rental add-vehicle.php unrestricted upload
A vulnerability, which was classified as critical, has been found in code-projects Car Rental 1.0. Affected by this issue is some unknown functionality of the file add-vehicle.php. The manipulation of the argument Upload Image leads to unrestricted upload. Th…
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Medium 6.5
File Upload vulnerability in Byzoro Networks Smart multi-service security gateway intelligent management platform versi…
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Medium 6.3
SourceCodester Image Accordion Gallery App add-image.php unrestricted upload
A vulnerability was found in SourceCodester Image Accordion Gallery App 1.0. It has been classified as critical. This affects an unknown part of the file /endpoint/add-image.php. The manipulation of the argument image_name leads to unrestricted upload. It is …
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Medium 4.7
YouDianCMS ChannelAction.class.php unrestricted upload
A vulnerability classified as critical was found in YouDianCMS up to 9.5.12. This vulnerability affects unknown code of the file App\Lib\Action\Admin\ChannelAction.class.php. The manipulation of the argument file leads to unrestricted upload. The attack can b…
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Medium 6.8
A vulnerability exists in the stb-language file handling that affects the RTU500 series product versions listed below. …
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Medium 6.3
cyberaz0r WebRAT api.php download_file unrestricted upload
** UNSUPPORTED WHEN ASSIGNED ** ** DISPUTED ** A vulnerability has been found in cyberaz0r WebRAT up to 20191222 and classified as critical. This vulnerability affects the function download_file of the file Server/api.php. The manipulation of the argument nam…
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Medium 6.3
SourceCodester Simple File Manager unrestricted upload
A vulnerability classified as critical was found in SourceCodester Simple File Manager 1.0. This vulnerability affects unknown code. The manipulation of the argument photo leads to unrestricted upload. The attack can be initiated remotely. The exploit has bee…
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Medium 6.5
VvvebJs Arbitrary File Upload vulnerability
Arbitrary File Upload vulnerability in VvvebJs before version 1.7.5, allows unauthenticated remote attackers to execute arbitrary code and obtain sensitive information via the sanitizeFileName parameter in save.php.
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Medium 4.7
SourceCodester Complete E-Commerce Site users_photo.php unrestricted upload
A vulnerability classified as critical has been found in SourceCodester Complete E-Commerce Site 1.0. Affected is an unknown function of the file /admin/users_photo.php. The manipulation of the argument photo leads to unrestricted upload. It is possible to la…
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Medium —
Ibexa Kernel's files with blacklisted extensions can be still saved to drafts
### Impact File validation can be configured to reject certain files by file type. When this happens, validation fails, and the content can't be published. However, the file can be saved when saving the content draft. This means unwanted files can be present …