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
1,210 results · Clear filters · Feed
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High 8.6
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High 8.2
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High 8.7CVE-2012-10056 Public exploit
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High 7.2
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High 7.3
oitcode samarium Create Product product unrestricted upload
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High 8.7CVE-2012-10042 Public exploit
Sflog! CMS 1.0 Arbitrary File Upload RCE
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High 8.1
A Remote Code Execution (RCE) vulnerability in Grav CMS v1.7.48 allows an authenticated admin to upload a malicious plu…
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High 8.2
An unrestricted file upload vulnerability in Vedo Suite version 2024.17 allows remote authenticated attackers to write …
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High 7.5
WP Import Export Lite <= 3.9.29 - Authenticated (Subscriber+) Arbitrary File Upload
The WP Import Export Lite plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'wpie_parse_upload_data' function in all versions up to, and including, 3.9.29. This makes it possible for authenticated attacker…
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High 7.5
WP Import Export Lite <= 3.9.28 - Authenticated (Subscriber+) Arbitrary File Upload
The WP Import Export Lite plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'wpie_tempalte_import' function in all versions up to, and including, 3.9.28. This makes it possible for authenticated attackers,…
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High 8.7CVE-2013-10044 Public exploit
OpenEMR ≤ 4.1.1 SQL Injection Privilege Escalation and RCE
An authenticated SQL injection vulnerability exists in OpenEMR ≤ 4.1.1 Patch 14 that allows a low-privileged attacker to extract administrator credentials and subsequently escalate privileges. Once elevated, the attacker can exploit an unrestricted file uploa…
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High 8.1
BerqWP <= 2.2.42 - Unauthenticated Arbitrary File Upload
The BerqWP – Automated All-In-One Page Speed Optimization for Core Web Vitals, Cache, CDN, Images, CSS, and JavaScript plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation via the store_javascript_cache.php file in …
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High 7.2
Emlog Pro V2.5.7 is vulnerable to Unrestricted Upload of File with Dangerous Type via /emlog/admin/plugin.php?action=up…
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High 8.8CVE-2025-7847 Public exploit
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High 8.8
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High 8.8CVE-2025-54769 Public exploit
KL-001-2025-016: Xorux LPAR2RRD File Upload Directory Traversal
An authenticated, read-only user can upload a file and perform a directory traversal to have the uploaded file placed in a location of their choosing. This can be used to overwrite existing PERL modules within the application to achieve remote code execution …
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High 7.3
code-projects Exam Form Submission register.php unrestricted upload
A vulnerability was found in code-projects Exam Form Submission 1.0. It has been rated as critical. This issue affects some unknown processing of the file /register.php. The manipulation of the argument image leads to unrestricted upload. The attack may be in…
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High 8.5
Unrestricted Upload of File with Dangerous Type vulnerability in Salesforce Tableau Server on Windows, Linux (Extensibl…
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High 8.4CVE-2014-125119 Public exploit
WinRAR < 5.00 Filename Spoofing RCE
A filename spoofing vulnerability exists in WinRAR when opening specially crafted ZIP archives. The issue arises due to inconsistencies between the Central Directory and Local File Header entries in ZIP files. When viewed in WinRAR, the file name from the Cen…
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High 8.6
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High 8.7CVE-2013-10032 Public exploit
GetSimple CMS 3.2.1 Authenticated RCE via Arbitrary PHP File Upload
An authenticated remote code execution vulnerability exists in GetSimpleCMS version 3.2.1. The application’s upload.php endpoint allows authenticated users to upload arbitrary files without proper validation of MIME types or extensions. By uploading a .pht fi…
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High 8.8
Droip < 2.5.2 - Authenticated (Subscriber+) Arbitrary File Upload
The Droip plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the make_google_font_offline() function in all versions up to, and excluding, 2.5.2. This makes it possible for authenticated attackers, with Subscri…
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High 8.8CVE-2015-10144 Public exploit
Responsive Thumbnail Slider < 1.0.1 - Authenticated (Subscriber+) Arbitrary File Upload
The Responsive Thumbnail Slider plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type sanitization in the via the image uploader in versions up to 1.0.1. This makes it possible for authenticated attackers, with subscriber-level…
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High 8.8CVE-2025-54439 EPSS 13%
Unrestricted Upload of File with Dangerous Type vulnerability in Samsung Electronics MagicINFO 9 Server allows Code Inj…
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High 8.8CVE-2025-54441 EPSS 15%
Unrestricted Upload of File with Dangerous Type vulnerability in Samsung Electronics MagicINFO 9 Server allows Code Inj…
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High 8.1
Unrestricted Upload of File with Dangerous Type vulnerability in Samsung Electronics MagicINFO 9 Server allows Code Inj…
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High 7.1CVE-2025-46099 Public exploit
In Pluck CMS 4.7.20-dev, an authenticated attacker can upload or create a crafted PHP file under the albums module dire…
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High 7.5
A vulnerability in the Mitel 6800 Series, 6900 Series, and 6900w Series SIP Phones through 6.4 SP4 (R6.4.0.4006), and t…
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High 7.3
code-projects Church Donation System admin_pic.php unrestricted upload
A vulnerability was found in code-projects Church Donation System 1.0. It has been rated as critical. Affected by this issue is some unknown functionality of the file /members/admin_pic.php. The manipulation of the argument image leads to unrestricted upload.…
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High 8.1
nova-tiptap has an Unauthenticated Arbitrary File Upload Vulnerability
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High 7.2
Simopro Technology｜WinMatrix3 Web package - Arbitrary File Upload
WinMatrix3 Web package developed by Simopro Technology has an Arbitrary File Upload vulnerability, allowing remote attackers with administrator privileges to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
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High 8.8
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High 7.5
MasterStudy LMS – Online Courses, eLearning PRO Plus <= 4.7.9 - Authenticated (Subscriber+) Arbitrary File Upload
The MasterStudy LMS Pro plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'install_and_activate_plugin' function in all versions up to, and including, 4.7.9. This makes it possible for authenticated a…
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High 7.3
Campcodes Online Movie Theater Seat Reservation System admin_class.php save_movie unrestricted upload
A vulnerability, which was classified as critical, was found in Campcodes Online Movie Theater Seat Reservation System 1.0. This affects the function save_movie of the file /admin/admin_class.php. The manipulation of the argument cover leads to unrestricted u…
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High 7.3
Campcodes Sales and Inventory System product_update.php unrestricted upload
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High 7.3
Campcodes Sales and Inventory System product_add.php unrestricted upload
A vulnerability was found in Campcodes Sales and Inventory System 1.0. It has been classified as critical. Affected is an unknown function of the file /pages/product_add.php. The manipulation of the argument image leads to unrestricted upload. It is possible …
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High 8.8
BeeTeam368 Extensions <= 2.3.5 - Authenticated (Subscriber+) Arbitrary File Upload
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High 8.8
WPBookit <= 1.0.4 - Authenticated (Subscriber+) Arbitrary File Upload
The WPBookit plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the handle_image_upload() function in all versions up to, and including, 1.0.4. This makes it possible for authenticated attackers, with Subscribe…
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High 8.6CVE-2025-34097 Public exploit
ProcessMaker < 3.5.4 Authenticated Plugin Upload RCE
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