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
40 results · Clear filters · Feed
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Medium 4.7CVE-2026-92247 Public exploit
synaptikcms synaptik-cms Admin File Manager file-manager.php rename unrestricted upload
A security vulnerability has been detected in synaptikcms synaptik-cms up to 1.3.4.4. This affects the function rename of the file admin/file-manager.php of the component Admin File Manager. The manipulation leads to unrestricted upload. The attack can be ini…
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Medium 6.5CVE-2026-12684 Public exploit
Customer Reviews for WooCommerce < 5.113.0 - Unauthenticated Arbitrary Media Upload via cr_upload_media
The Customer Reviews for WooCommerce WordPress plugin before 5.113.0 does not perform authentication, capability, or nonce checks on one of its media upload AJAX actions when the review media attachment feature is enabled, allowing unauthenticated users to up…
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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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Medium 6.3CVE-2025-67886 Public exploit
Bitrix24 through 25.100.300 allows Remote Code Execution because an actor with SOURCE/WRITE permissions for the Transla…
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Medium 4.7CVE-2026-7393 Public exploit
SourceCodester Pizzafy Ecommerce System File Extension admin_class_novo.php save_menu unrestricted upload
A vulnerability was found in SourceCodester Pizzafy Ecommerce System 1.0. Affected is the function save_menu of the file /admin/admin_class_novo.php of the component File Extension Handler. Performing a manipulation of the argument img results in unrestricted…
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Medium 6.1CVE-2025-70849 Public exploit
Podinfo affected by Arbitrary File Upload that leads to Stored Cross-Site Scripting (XSS)
Arbitrary File Upload in podinfo thru 6.9.0 allows unauthenticated attackers to upload arbitrary files via crafted POST request to the /store endpoint. The application renders uploaded content without a restrictive Content-Security-Policy (CSP) or adequate Co…
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Medium 4.7CVE-2025-15495 Public exploit
BiggiDroid Simple PHP CMS editsite.php unrestricted upload
A vulnerability was found in BiggiDroid Simple PHP CMS 1.0. This impacts an unknown function of the file /admin/editsite.php. The manipulation of the argument image results in unrestricted upload. The attack can be launched remotely. The exploit has been made…
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Medium 6.8CVE-2025-66837 Public exploit
A file upload vulnerability in ARIS 10.0.23.0.3587512 allows attackers to execute arbitrary code via uploading a crafte…
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Medium 6.5CVE-2025-57176 Public exploit
On Ceragon Networks / Siklu Communication EtherHaul and MultiHaul Series microwave antennas before 2026-03-10, the rfpi…
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Medium 6.5CVE-2025-52078 Public exploit
File upload vulnerability in Writebot AI Content Generator SaaS React Template thru 4.0.0, allowing remote attackers to…
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Medium 6.4CVE-2025-54962 Public exploit
/edit-user in webserver in OpenPLC Runtime 3 through 9cd8f1b allows authenticated users to upload arbitrary files (such…
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Medium 5.3CVE-2025-46080 Public exploit
HuoCMS V3.5.1 has a File Upload Vulnerability. An attacker can exploit this flaw to bypass whitelist restrictions and c…
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Medium 5.3CVE-2025-46078 Public exploit
HuoCMS V3.5.1 and before is vulnerable to file upload, which allows attackers to take control of the target server
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Medium 6.6CVE-2025-47550 Public exploit
WordPress Instantio plugin <= 3.3.16 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Themefic Instantio instantio allows Upload a Web Shell to a Web Server.This issue affects Instantio: from n/a through <= 3.3.16.
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Medium 6.3CVE-2025-3969 Public exploit
codeprojects News Publishing Site Dashboard Edit Category Page edit-category.php unrestricted upload
A vulnerability was found in codeprojects News Publishing Site Dashboard 1.0. It has been rated as critical. This issue affects some unknown processing of the file /edit-category.php of the component Edit Category Page. The manipulation of the argument catego…
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Medium 6.6CVE-2025-39538 Public exploit
WordPress WP-Advanced-Search plugin <= 3.3.9.4 - Arbitrary File Upload Vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Mathieu Chartier WP-Advanced-Search wp-advanced-search allows Upload a Web Shell to a Web Server.This issue affects WP-Advanced-Search: from n/a through <= 3.3.9.4.
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Medium 6.1
Kentico Xperience stored cross-site scripting in multiple-file upload functionality
The Kentico Xperience application does not fully validate or filter files uploaded via the multiple-file upload functionality, which allows for stored XSS.This issue affects Kentico Xperience through 13.0.178.
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Medium 6.6CVE-2024-56264 Public exploit
WordPress ACF City Selector plugin <= 1.14.0 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Beee ACF City Selector acf-city-selector allows Upload a Web Shell to a Web Server.This issue affects ACF City Selector: from n/a through <= 1.14.0.
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Medium 6.3CVE-2024-10410 Public exploit
SourceCodester Online Hotel Reservation System controller.php upload unrestricted upload
A vulnerability classified as critical was found in SourceCodester Online Hotel Reservation System 1.0. Affected by this vulnerability is the function upload of the file /admin/mod_room/controller.php?action=add. The manipulation of the argument image leads t…
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Medium 6.8CVE-2024-8743 Public exploit
Bit File Manager – 100% Free & Open Source File Manager and Code Editor for WordPress <= 6.5.7 - Authenticated (Subscriber+) Limited JavaScript File Upload
The Bit File Manager – 100% Free & Open Source File Manager and Code Editor for WordPress plugin for WordPress is vulnerable to Limited JavaScript File Upload in all versions up to, and including, 6.5.7. This is due to a lack of proper checks on allowed file …
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Medium 5.4CVE-2024-0757 Public exploit
Insert or Embed Articulate Content into WordPress <= 4.3000000023 - Author+ Upload to RCE
The Insert or Embed Articulate Content into WordPress plugin through 4.3000000023 is not properly filtering which file extensions are allowed to be imported on the server, allowing the uploading of malicious code within zip files
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Medium 6.5CVE-2024-29272 Public exploit
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 6.3CVE-2024-0783 Public exploit
Project Worlds Online Admission System documents.php unrestricted upload
A vulnerability was found in Project Worlds Online Admission System 1.0 and classified as critical. This issue affects some unknown processing of the file documents.php. The manipulation leads to unrestricted upload. The attack may be initiated remotely. The …
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Medium 4.7CVE-2023-5966 Public exploit
Unrestricted Upload of File with Dangerous Type in EspoCRM
An authenticated privileged attacker could upload a specially crafted zip to the EspoCRM server in version 7.2.5, via the extension deployment form, which could lead to arbitrary PHP code execution.
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Medium 4.7CVE-2023-5965 Public exploit
Unrestricted Upload of File with Dangerous Type in EspoCRM
An authenticated privileged attacker could upload a specially crafted zip to the EspoCRM server in version 7.2.5, via the update form, which could lead to arbitrary PHP code execution.
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Medium 5.4CVE-2023-44763 Public exploit
ConcreteCMS vulnerable to Stored Cross-site Scripting
Concrete CMS v9.2.1 is affected by an Arbitrary File Upload vulnerability via a Thumbnail file upload, which allows Cross-Site Scripting (XSS). NOTE: the vendor's position is that a customer is supposed to know that "pdf" should be excluded from the allowed f…
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Medium 6.1CVE-2023-41564 Public exploit
Cockpit CMS arbitrary file upload vulnerability
An arbitrary file upload vulnerability in the Upload Asset function of Cockpit CMS v2.6.3 allows attackers to execute arbitrary code via uploading a crafted .shtml file.
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Medium 6.4CVE-2023-24517 Public exploit
Remote Code Execution via Unrestricted File Upload
Unrestricted Upload of File with Dangerous Type vulnerability in the Pandora FMS File Manager component, allows an attacker to make make use of this issue ( unrestricted file upload ) to execute arbitrary system commands. This issue affects Pandora FMS v767 v…
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Medium 6.3
Dahua Smart Park Management unrestricted upload
A vulnerability classified as critical was found in Dahua Smart Park Management up to 20230713. This vulnerability affects unknown code of the file /emap/devicePoint_addImgIco?hasSubsystem=true. The manipulation of the argument upload leads to unrestricted up…
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Medium 6.3CVE-2023-3187 Public exploit
PHPGurukul Teachers Record Management System Profile Picture changeimage.php unrestricted upload
A vulnerability, which was classified as critical, has been found in PHPGurukul Teachers Record Management System 1.0. Affected by this issue is some unknown functionality of the file /changeimage.php of the component Profile Picture Handler. The manipulation…
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Medium 6.3CVE-2023-2246 Public exploit
SourceCodester Online Pizza Ordering System unrestricted upload
A vulnerability has been found in SourceCodester Online Pizza Ordering System 1.0 and classified as critical. This vulnerability affects unknown code of the file admin/ajax.php?action=save_settings. The manipulation of the argument img leads to unrestricted u…
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Medium 6.3CVE-2023-2245 Public exploit
hansunCMS unrestricted upload
A vulnerability was found in hansunCMS 1.4.3. It has been declared as critical. This vulnerability affects unknown code of the file /ueditor/net/controller.ashx?action=catchimage. The manipulation leads to unrestricted upload. The attack can be initiated remo…
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Medium 5.3
Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Arbitrary File Upload Vulnerability
A vulnerability in the web-based management interface of Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an unauthenticated, remote attacker to upload arbitrary files to an affected device. This vulnerability is due to insuffic…
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Medium 6.3CVE-2023-1826 Public exploit
SourceCodester Online Computer and Laptop Store index.php unrestricted upload
A vulnerability, which was classified as critical, was found in SourceCodester Online Computer and Laptop Store 1.0. This affects an unknown part of the file php-ocls\admin\system_info\index.php. The manipulation of the argument img leads to unrestricted uplo…
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Medium 4.7CVE-2023-0943 Public exploit
SourceCodester Best POS Management System Image save_settings unrestricted upload
A vulnerability, which was classified as problematic, has been found in SourceCodester Best POS Management System 1.0. This issue affects the function save_settings of the file index.php?page=site_settings of the component Image Handler. The manipulation of t…
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Medium 4.6CVE-2022-32114 Public exploit
Strapi 4.1.12 Cross-site Scripting via crafted file
An unrestricted file upload vulnerability in the Add New Assets function of Strapi 4.1.12 allows attackers to conduct XSS attacks via a crafted PDF file. NOTE: the project documentation suggests that a user with the Media Library "Create (upload)" permission …
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Medium 6.3CVE-2022-2297 Public exploit
SourceCodester Clinics Patient Management System unrestricted upload
A vulnerability, which was classified as critical, was found in SourceCodester Clinics Patient Management System 2.0. Affected is an unknown function of the file /pms/update_user.php?user_id=1. The manipulation of the argument profile_picture with the input <…
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Medium 6.6
Microsoft Exchange Server Security Feature Bypass Vulnerability
Microsoft Exchange Server Security Feature Bypass Vulnerability
KEV Nov 3, 2021 -
Medium 4.3CVE-2020-8866 Public exploit
This vulnerability allows remote attackers to create arbitrary files on affected installations of Horde Groupware Webma…
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Medium 6.3
MoinMoin Multiple unrestricted file upload vulnerabilities
Multiple unrestricted file upload vulnerabilities in the (1) twikidraw (action/twikidraw.py) and (2) anywikidraw (action/anywikidraw.py) actions in MoinMoin before 1.9.6 allow remote authenticated users with write permissions to execute arbitrary code by uplo…