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
146 results · Clear filters · Feed
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High 8.8CVE-2026-109384 Public exploit
The Innovative Form Builder <= 1.5.1 - Authenticated (Custom+) Arbitrary File Upload via 'allowedFileExtensions' Configuration + Public /form/submission/ Multipart Upload
The The Innovative Form Builder – IvyForms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.5.1 via the filterFiletypeAndExt function. This is due to insufficient file type validation due to the absence of a …
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High 7.3CVE-2026-110025 Public exploit
slackero phpwcms Extension Check cnt23.article.inc.php unrestricted upload
A flaw has been found in slackero phpwcms up to 1.9.49/1.12.3. This issue affects some unknown processing of the file include/inc_front/content/cnt23.article.inc.php of the component Extension Check. This manipulation of the argument POST_name causes unrestri…
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High 8.6CVE-2026-96515 Public exploit
Command Injection Vulnerability in Netlink ICT HG323RW Router
This vulnerability exists in the Netlink ICT HG323RW router due to insufficient authorization and input validation controls in the diagnostic script import functionality. An authenticated attacker could exploit this vulnerability by uploading and executing a …
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High 8.1CVE-2026-78839 Public exploit
An arbitrary file upload vulnerability in AppNitro MachForm v30 allows attackers to execute arbitrary code via uploadin…
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High 8.1CVE-2026-19219 Public exploit
DialogHandler UploadPaths Tampering Vulnerability in Telerik UI for ASP.NET AJAX
In Progress® Telerik® UI for AJAX prior to v2026.3.812, insufficient integrity protection of dialog request parameters used by the RadEditor file browser may allow an attacker who has obtained certain application encryption key material to alter the folders t…
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High 8.9CVE-2026-73373 Public exploit
Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2
Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The default list of dangerous files did not include SHTML files. On servers that executed these files, that could lead to code execution.
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High 8.8CVE-2026-65640 Public exploit
WordPress is vulnerable to a remote code execution vulnerability via malicious Postscript file upload by an Author leve…
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High 7.2CVE-2026-13157 Public exploit
Theme Demo Import <= 1.1.3 - Admin+ Arbitrary File Upload
The Demo Import WordPress plugin through 1.1.3 does not validate the type of files uploaded during demo-content import (the WordPress file-type test is disabled), allowing high-privilege users (Administrator by default, including non-super-admin site administ…
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High 7.2CVE-2026-13158 Public exploit
Everest Toolkit <= 1.2.3 - Admin+ Arbitrary File Upload
The Everest Toolkit WordPress plugin through 1.2.3 does not validate the type of files uploaded during demo-content import (the WordPress file-type test is disabled), allowing high-privilege users (Administrator by default, including non-super-admin site admi…
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High 8.8CVE-2026-67206 Public exploit
Wolf CMS 0.8.3.1 Authenticated RCE via FileManagerController File Upload
Wolf CMS through 0.8.3.1 contains a remote code execution vulnerability in FileManagerController that allows authenticated attackers to create arbitrary PHP files by exploiting missing file extension validation in the create_file() and save() functions. Attac…
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High 8.1CVE-2026-10818 Public exploit
WPForms Pro <= 1.10.1.1 - Unauthenticated Arbitrary File Write via Chunked Upload Init/Finalize Ordering
The WPForms Pro plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.10.1.1 via the ajax_chunk_upload_finalize function. This is due to the file type validation occurring after chunk metadata and file contents ha…
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High 8.8CVE-2026-23697 Public exploit
Vtiger CRM < 8.4.0 Authenticated File Upload RCE via Documents Module
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High 7.2CVE-2026-23698 Public exploit
Vtiger CRM 8.4.0 Authenticated RCE via Module Import File Upload
Vtiger CRM through 8.4.0 contains an authenticated remote code execution vulnerability in the admin module import feature that allows administrator-level attackers to upload arbitrary PHP files by submitting a crafted zip archive through the ModuleManager imp…
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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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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 7.3CVE-2026-11344 Public exploit
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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 7.2CVE-2026-38751 Public exploit
OpenSTAManager contains an arbitrary file upload vulnerability in its module update functionality
OpenSTAManager version 2.10 and earlier contains an arbitrary file upload vulnerability in the module update functionality (modules/aggiornamenti/upload_modules.php)
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High 7.2CVE-2026-37748 Public exploit
Visitor Management System 1.0 by sanjay1313 is vulnerable to Unrestricted File Upload in vms/php/admin_user_insert.php …
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High 8.9CVE-2026-40487 Public exploit
Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS
Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the `Content-Type` header. The uploade…
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High 8.1CVE-2026-5718 Public exploit
Drag and Drop Multiple File Upload for Contact Form 7 <= 1.3.9.7 - Unauthenticated Arbitrary File Upload via Non-ASCII Filename Blacklist Bypass
The Drag and Drop Multiple File Upload for Contact Form 7 plugin for WordPress is vulnerable to arbitrary file upload in versions up to, and including, 1.3.9.7. This is due to insufficient file type validation that occurs when custom blacklist types are confi…
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High 8.7CVE-2026-25099 Public exploit
Remote Code Execution via Unrestricted File Upload in Bludit
Bludit’s API plugin allows an authenticated attacker with a valid API token to upload files of any type and extension without restriction, which can then be executed, leading to Remote Code Execution. This issue was fixed in 3.18.4.
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High 8.8CVE-2026-29041 Public exploit
Chamilo: Authenticated Remote Code Execution via Unrestricted File Upload
Chamilo is a learning management system. Prior to version 1.11.34, Chamilo LMS is affected by an authenticated remote code execution vulnerability caused by improper validation of uploaded files. The application relies solely on MIME-type verification when ha…
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High 8.8CVE-2026-27636 Public exploit
FreeScout: Missing .htaccess in Restricted File Extensions Allows Remote Code Execution on Apache
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High 8.8CVE-2026-26746 Public exploit
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High 8.8CVE-2025-69906 Public exploit
Monstra CMS v3.0.4 contains an arbitrary file upload vulnerability in the Files Manager plugin. The application relies …
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High 7.5CVE-2026-0911 Public exploit
Hustle <= 7.8.9.2 - Authenticated (Subscriber+) Arbitrary File Upoload via Module Import
The Hustle – Email Marketing, Lead Generation, Optins, Popups plugin for WordPress is vulnerable to arbitrary file uploads due to incorrect file type validation in the action_import_module() function in all versions up to, and including, 7.8.9.2. This makes i…
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High 8.5CVE-2026-23499 Public exploit
Saleor vulnerable to stored XSS via Unrestricted File Upload
Saleor is an e-commerce platform. Starting in version 3.0.0 and prior to versions 3.20.108, 3.21.43, and 3.22.27, Saleor allowed authenticated staff users or Apps to upload arbitrary files, including malicious HTML and SVG files containing Javascript. Dependi…
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High 7.3CVE-2026-22241 Public exploit
Open eClass has Unrestricted File Upload that Leads to Remote Code Execution (RCE)
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High 8.8CVE-2025-13543 Public exploit
PostGallery <= 1.12.5 - Authenticated (Subscriber+) Arbitrary File Upload
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High 7.6CVE-2025-65027 Public exploit
RomM Chained XSS and CSRF Vulnerabilities Enable Admin Account Takeover
RomM (ROM Manager) allows users to scan, enrich, browse and play their game collections with a clean and responsive interface. RomM contains multiple unrestricted file upload vulnerabilities that allow authenticated users to upload malicious SVG or HTML files…
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High 7.2CVE-2025-12973 Public exploit
S2B AI Assistant – ChatBot, ChatGPT, OpenAI, Content & Image Generator <= 1.7.8 - Authenticated (Editor+) Arbitrary File Upload
The S2B AI Assistant – ChatBot, ChatGPT, OpenAI, Content & Image Generator plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the storeFile() function in all versions up to, and including, 1.7.8. This makes it …
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High 8.8CVE-2025-13156 Public exploit
Vitepos – Point of Sale (POS) for WooCommerce <= 3.3.0 - Authenticated (Subscriber+) Arbitrary File Upload to Remote Code Execution
The Vitepos – Point of Sale (POS) for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the insert_media_attachment() function in all versions up to, and including, 3.3.0. This is due to the save_u…
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High 7.2CVE-2025-12399 Public exploit
Alex Reservations: Smart Restaurant Booking <= 2.2.3 - Authenticated (Admin+) Arbitrary File Upload
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High 8.6
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High 7.3CVE-2025-55912 Public exploit
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High 8.8CVE-2025-9216 Public exploit
StoreEngine – Powerful WordPress eCommerce Plugin for Payments, Memberships, Affiliates, Sales & More <= 1.5.0 - Authenticated (Subscriber+) Arbitrary File Upload
The StoreEngine – Powerful WordPress eCommerce Plugin for Payments, Memberships, Affiliates, Sales & More plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the import() function in all versions up to, and incl…
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High 7.2CVE-2025-57642 Public exploit
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