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
3,429 results · Feed
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Critical 9.1CVE-2026-9067 Public exploit
Schema & Structured Data for WP & AMP < 1.60 - Unauthenticated Arbitrary Media Upload
The Schema & Structured Data for WP & AMP WordPress plugin before 1.60 does not check user capabilities on its frontend AJAX file-upload handlers and does not validate the actual content of uploaded files against the endpoint's intended media type, allowing u…
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Medium 6.1
A vulnerability has been identified in SIPROTEC 5 6MD84 (CP300) (All versions), SIPROTEC 5 6MD85 (CP200) (All versions)…
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Medium 6.5
Apache Answer: The custom avatar was not properly validated
Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. The server did not sufficiently validate user-supplied image URLs, allowing arbitrary external content to be embedded as profile i…
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Medium 6.5
Apache Answer: Uploading specially crafted TIFF files causes an Out-of-Memory error
Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. A crafted TIFF image could trigger excessive memory allocation during image decoding, allowing an authenticated user to cause the …
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Medium 4.7
Dcat-Admin User Setting upload editorMDUpload unrestricted upload
A weakness has been identified in Dcat-Admin up to 2.2.3-beta. This impacts the function editorMDUpload of the file /admin/dcat-api/editor-md/upload of the component User Setting Page. This manipulation of the argument editormd-image-file causes unrestricted …
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Medium 5.4
An authenticated arbitrary file upload vulnerability in the /api/create-car-image component of bookcars v8.3 allows att…
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Critical 9.8
WordPress Theme Travelscape 1.0.3 Arbitrary File Upload
WordPress Theme Travelscape 1.0.3 contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload malicious files by exploiting insufficient validation in the theme's upload functionality. Attackers can upload arbitrary files t…
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Critical 9.8
WordPress Background Image Cropper 1.2 Remote Code Execution
WordPress Background Image Cropper version 1.2 contains a remote code execution vulnerability that allows unauthenticated attackers to upload arbitrary files by accessing the ups.php endpoint. Attackers can upload PHP files through the file upload form in the…
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High 7.3
Kushan2k student-management-system Registration Endpoint RegisterService.php unrestricted upload
A security flaw has been discovered in Kushan2k student-management-system up to f16a4ceaddd6729c4b306ed4641cda3176c1ef2a. Affected is an unknown function of the file service/RegisterService.php of the component Registration Endpoint. Performing a manipulation…
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High 7.2CVE-2026-7537 Public exploit
MDJM Event Management <= 1.7.8.3 - Authenticated (Administrator+) Arbitrary File Upload via 'mdjm_email_upload_file' Parameter
The MDJM Event Management plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.7.8.3 via the mdjm_send_comm_email function. This is due to no file type, extension, or MIME type validation being performed on uploa…
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Critical 9.4
Path Traversal in Altium Enterprise Server Vault UploadController Allows Arbitrary File Write
A path traversal vulnerability exists in the Altium Enterprise Server Vault Service UploadController due to improper validation of a user-controlled path component in image upload requests. An authenticated user can supply a crafted absolute path so that the …
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High 8.7
HAXCMS PHP has a File Upload Validation Bypass
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 11.0.6 and prior to version 25.0.0, the file upload functionality in HAXCMS PHP only validates file extensions using a regex pattern without checking the actual file cont…
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High 8.8CVE-2026-5411 Public exploit
WP Captcha PRO <= 5.38 - Missing Authorization to Authenticated (Subscriber+) Arbitrary File Upload
The WP Captcha PRO (the premium version of the Advanced Google reCAPTCHA plugin, both have the same slug) plugin for WordPress is vulnerable to arbitrary file upload in all versions up to, and including, 5.38. This is due to a capability check in the save_aja…
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High 8.7
HAX CMS PHP Has a Stored XSS via Case-Sensitivity Mismatch in HTML Upload Validation
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0 of HAX CMS PHP, the `saveFile` endpoint validates upload extensions case-insensitively and writes the filename to disk verbatim, but the `.htaccess` rule that forces …
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High 7.3CVE-2026-11344 Public exploit
code-projects Vehicle Management System New Driver Registration Form newdriver.php unrestricted upload
A vulnerability was found in code-projects Vehicle Management System 1.0. This impacts an unknown function of the file newdriver.php of the component New Driver Registration Form. Performing a manipulation of the argument photo results in unrestricted upload.…
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Medium 6.3
tittuvarghese CollegeManagementSystem Student Data Upload Endpoint upload_student_data.php unrestricted upload
A security vulnerability has been detected in tittuvarghese CollegeManagementSystem 3e476335cfbfb9a049e09f474c7ec885f69a9df3/a38852979f7e27ae67b610dce5979500ef8ebe01. The impacted element is an unknown function of the file dashboard_page/forms/upload_student_…
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Medium 6.3
IRIS has an Insecure File Upload
IRIS is a web collaborative platform that helps incident responders share technical details during investigations. Versions prior to 2.4.28 do not properly validate uploaded files. The application can therefore be misused to host phishing pages, amongst other…
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Medium 6.3
mjperpinosa stumasy change_profile_image.php unrestricted upload
A vulnerability was determined in mjperpinosa stumasy. The impacted element is an unknown function of the file application/PHP/objects/profiles/change_profile_image.php. Executing a manipulation of the argument pr_profile_image can lead to unrestricted upload…
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Medium 6.3
mjperpinosa stumasy add_post.php unrestricted upload
A vulnerability was found in mjperpinosa stumasy. The affected element is an unknown function of the file application/PHP/objects/updates/add_post.php. Performing a manipulation of the argument up_file_to_post results in unrestricted upload. The attack may be…
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Medium 6.4
Unrestricted Upload of File with Dangerous Type in SOPlanning
SOPlanning does not verify uploaded file extension. An authenticated attacker with access to the backup functionality can upload a crafted ZIP archive containing a legitimate user.csv file alongside a malicious file, which is extracted on the server. When com…
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Medium 6.3
Metasoft 美特软件 MetaCRM upload.jsp unrestricted upload
A security vulnerability has been detected in Metasoft 美特软件 MetaCRM 6.4.0. The impacted element is an unknown function of the file develop/systparam/softlogo/upload.jsp. Such manipulation leads to unrestricted upload. The attack may be launched remotely. The …
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Medium 6.3
Bdtask Multi-Store Inventory Management System Component Module.php upload unrestricted upload
A security flaw has been discovered in Bdtask Multi-Store Inventory Management System 1.0. The affected element is the function Upload of the file application/modules/dashboard/controllers/Module.php of the component Component Module. The manipulation of the …
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High 8.8
SIM-PKH 2.4.1 Arbitrary File Upload via aksi_pengurus.php
SIM-PKH 2.4.1 contains an arbitrary file upload vulnerability that allows authenticated attackers to upload malicious files by submitting PHP code through the fupload parameter. Attackers can upload PHP files via the aksi_pengurus.php endpoint with module=pen…
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High 8.8
HaPe PKH 1.1 Arbitrary File Upload via aksi_foto.php
HaPe PKH 1.1 contains an arbitrary file upload vulnerability that allows authenticated attackers to upload malicious files by bypassing file type validation. Attackers can upload PHP files through multiple endpoints including aksi_foto.php, aksi_user.php, and…
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High 7.2
Interinfo｜DreamMaker - Arbitrary File Upload
DreamMaker developed by Interinfo has an Arbitrary File Upload vulnerability, allowing privileged remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
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Critical 9.8
Interinfo｜DreamMaker - Arbitrary File Upload
DreamMaker developed by Interinfo has an Arbitrary File Upload vulnerability, allowing unauthenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
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High 7.3CVE-2026-39292 Public exploit
Falco Solutions PHPPageBuilder v0.31.0 contains an unrestricted file upload vulnerability in the pagemanager/pagebuilde…
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High 8.8
GutenBee <= 2.20.1 - Authenticated (Author+) Arbitrary File Upload via wp_check_filetype_and_ext Filter
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High 8.8
Crawlomatic Multipage Scraper Post Generator <= 2.7.2 - Authenticated (Author+) Remote Code Execution via 'callback_raw' Shortcode Attribute
The Crawlomatic Multipage Scraper Post Generator plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 2.7.2 via the filter_content function. This is due to passing the attacker-supplied 'callback_raw' shortcode att…
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High 7.3
An arbitrary file upload vulnerability in the pages/admin.uploadmapimg.php component of SourceBans Material Admin v1.1.…
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Medium 6.3CVE-2026-42879 Public exploit
FacturaScripts: Authenticated Remote Code Execution (RCE) via GIF Image Upload in Product Images
FacturaScripts is an open source accounting and invoicing software. In 2025.81 and earlier, an authenticated unrestricted file upload vulnerability exists in FacturaScripts' product image upload functionality. An attacker with valid credentials can upload a P…
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High 8.2
Dalfox: Unauthenticated Arbitrary File Create/Append via `output` Option in Dalfox Server Mode
Dalfox is a powerful open-source XSS scanner and utility focused on automation. Prior to 2.13.0, when dalfox is run in REST API server mode, the output, output-all, and debug fields in model.Options are JSON-tagged and deserialized directly from the attacker'…
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High 7.6
Budibase: Unrestricted Upload of File with Dangerous Type
Budibase is an open-source low-code platform. Prior to 3.38.2, the file upload endpoint POST /api/attachments/process does not enforce active-content restrictions for authenticated users. The checks for dangerous file extensions are conditionally wrapped insi…
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Critical 9.9
WordPress WPify Woo Czech plugin <= 5.4.1 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in WPify WPify Woo Czech wpify-woo allows Upload a Web Shell to a Web Server.This issue affects WPify Woo Czech: from n/a through <= 5.4.1.
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Medium 6.3
SourceCodester Simple POS and Inventory System File Extension addproduct.php unrestricted upload
A flaw has been found in SourceCodester Simple POS and Inventory System 1.0. Impacted is an unknown function of the file /admin/addproduct.php of the component File Extension Handler. This manipulation of the argument image causes unrestricted upload. Remote …
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High 7.3
KLiK SocialMediaWebsite File upload.inc.php uniqid unrestricted upload
A vulnerability was determined in KLiK SocialMediaWebsite 1.0. This vulnerability affects the function uniqid of the file upload.inc.php of the component File Handler. This manipulation causes unrestricted upload. The attack can be initiated remotely. The exp…
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Medium 6.3
yangzongzhuan RuoYi-Vue Common Upload Endpoint upload FileUploadUtils.upload unrestricted upload
A vulnerability was found in yangzongzhuan RuoYi-Vue up to 3.9.2. Impacted is the function FileUploadUtils.upload of the file /common/upload of the component Common Upload Endpoint. Performing a manipulation results in unrestricted upload. The attack is possi…
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Critical 10.0
Azure Orbital Spatio Remote Code Execution Vulnerability
Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code over a network.
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Medium 6.9
Mothra would respect a default value given by a website for HTML file upload forms. An attacker could craft a website w…
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Critical 9.8
BookingPress Pro <= 5.6 - Unauthenticated Arbitrary File Upload via Signature Custom Field
The BookingPress Pro plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'bookingpress_validate_submitted_booking_form_func' function in all versions up to, and including, 5.6. This makes it possible for una…