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
1,154 results · Clear filters · Feed
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Critical 9.9
WordPress WoowBot Pro Max plugin <= 14.1.7 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in quantumcloud WoowBot Pro Max woowbot-pro-max allows Using Malicious Files.This issue affects WoowBot Pro Max: from n/a through <= 14.1.7.
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Critical 10.0
WordPress Aimogen Pro plugin <= 2.8.3 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in CodeRevolution Aimogen Pro aimogen-pro allows Using Malicious Files.This issue affects Aimogen Pro: from n/a through <= 2.8.3.
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Critical 10.0
Joomla Extension - rsjoomla.com - Unauthenticated file upload in RSFiles component < 1.17.12
Joomla Extension - rsjoomla.com - Unauthenticated file upload in RSFiles component < 1.17.12 - The Joomla extension RSFiles is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
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Critical 9.0
Joomla Extension - phoca.cz - Authenticated file upload in Phoca Downloads component < 6.1.3
Joomla Extension - phoca.cz - Authenticated file upload in Phoca Downloads component < 6.1.3 - The Joomla extension Phoca Downloads is vulnerable to an authenticated arbitrary file upload that allows registered users uploading executable files and leads to fu…
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Critical 9.8CVE-2026-15282 Public exploit
Instant Appointment <= 1.2 - Unauthenticated Arbitrary File Upload
The Instant Appointment plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'insapp_upload_image_as_attachment' function in all versions up to, and including, 1.2. This makes it possible for unauthenticated …
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Critical 9.8
Super Forms <= 6.3.313 - Unauthenticated Arbitrary File Upload via 'data' Parameter (datauristring / value)
The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 6.3.313 via the submit_form function. This is due to missing file type validation and the absence of any capability ch…
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Critical 10.0
Joomla Extension - balbooa.com - Unauthenticated file upload in Balbooa Forms extension < 2.4.1
Joomla Extension - balbooa.com - Unauthenticated file upload in Balbooa Forms extension < 2.4.1 - The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
KEV Jul 10, 2026 -
Critical 9.8
Blocksy Companion <= 2.1.46 - Unauthenticated Arbitrary File Upload via 'blc-review-images[]' Parameter
The Blocksy Companion plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.1.46 via the save_attachments function. This is due to the Custom Fonts extension registering a wp_check_filetype_and_ext filter that app…
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Critical 9.8CVE-2026-58480 Public exploit
Blocksy Companion Pro < 2.1.47 Unauthenticated File Upload via save_attachments
Blocksy Companion Pro plugin for WordPress before 2.1.47 contains an unauthenticated arbitrary file upload vulnerability that allows attackers to upload executable files by bypassing extension validation in the save_attachments function exposed through the Ad…
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Critical 9.8
WPFunnels <= 3.12.7 - Unauthenticated Remote Code Execution via 'postData' Parameter
The WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 3.12.7 via the 'postData' parameter parameter. This is due to unsanitized write o…
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Critical 9.8
Unvalidated File Upload vulnerability in ArcGIS Server.
Esri ArcGIS Server contains an unrestricted file upload vulnerability. An unauthenticated attacker could exploit this issue by uploading a crafted file to the affected endpoint. Successful exploitation could allow arbitrary file upload, potentially allowing f…
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Critical 9.8
Apache IoTDB: Path Traversal in DataNode Internal RPC Trigger JAR Upload Allows Arbitrary File Write
Apache IoTDB DataNode’s internal RPC interface for creating Trigger instances uses the uploaded Trigger JAR name to build a file path without sufficient validation. If the internal DataNode RPC port is exposed to an untrusted network, an attacker may use path…
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Critical 9.8
Yonyou KSOA 9.0 Unauthenticated File Upload RCE via ImageUpload Servlet
Yonyou KSOA 9.0 contains an unauthenticated arbitrary file upload vulnerability in the com.sksoft.bill.ImageUpload servlet that allows unauthenticated attackers to upload arbitrary files by submitting a POST request with attacker-controlled filepath and filen…
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Critical 9.8
Redsea Cloud eHR Unauthenticated File Upload RCE via PtFjk.mob
Redsea Cloud eHR contains an arbitrary file upload vulnerability that allows unauthenticated attackers to achieve remote code execution by uploading malicious files through the PtFjk.mob servlet endpoint. Attackers can submit a multipart POST request with a J…
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Critical 9.8
Divi Form Builder <= 5.1.8 - Unauthenticated Arbitrary File Upload Leading to Remote Code Execution via 'acceptFileTypes' Parameter
The Divi Form Builder plugin for WordPress is vulnerable to Arbitrary File Upload leading to Remote Code Execution in all versions up to and including 5.1.8. This is due to insufficient file extension validation in the do_image_upload() function where user-su…
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Critical 9.9
WordPress Zegen theme <= 1.1.9 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Zegen <= 1.1.9 versions.
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Critical 10.0
ColdFusion | Unrestricted Upload of File with Dangerous Type (CWE-434)
ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user…
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Critical 10.0
ColdFusion | Unrestricted Upload of File with Dangerous Type (CWE-434)
ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user…
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Critical 10.0
Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0
Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0 - The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
KEV Jul 7, 2026 -
Critical 9.1
WordPress TemplateSpare plugin <= 4.2.0 - Arbitrary File Upload vulnerability
Administrator Arbitrary File Upload in TemplateSpare <= 4.2.0 versions.
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Critical 9.9
WordPress Travel Booking theme <= 2.2.5 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Travel Booking <= 2.2.5 versions.
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Critical 9.9
WordPress Quform plugin <= 2.23.0 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Quform <= 2.23.0 versions.
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Critical 9.9
WordPress Booster for WooCommerce plugin <= 8.0.1 - Arbitrary File Upload vulnerability
Customer Arbitrary File Upload in Booster for WooCommerce <= 8.0.1 versions.
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Critical 9.3
Flowise - Arbitrary File Upload via Unauthenticated /api/v1/attachments Endpoint
Flowise through 2.2.4 contains an unauthenticated arbitrary file upload vulnerability in the /api/v1/attachments endpoint when storageType is set to local. Attackers can exploit path traversal in the chatId and chatflowId parameters to upload malicious files …
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Critical 10.0
WordPress OMGF Pro plugin <= 5.2.6 - Arbitrary File Upload vulnerability
Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This issue affects OMGF Pro: from n/a through 5.2.6.
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Critical 9.8
motionEye: LFI → pass‑the‑hash admin → unsafe restore → unauth action exec (RCE)
## Summary A multi‑stage chain in motionEye leads to remote code execution. The chain combines: 1. **Arbitrary file read (LFI)** via the picture download endpoint for **local motion cameras** using absolute paths. 2. **Pass‑the‑hash admin auth** due to accept…
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Critical 10.0
Joomla Extension - joomshaper.com - Remote Code Execution in SP Pagebuilder extension for Joomla < 6.6.2
A vulnerability in SP Page Builder for Joomla allows unauthenticated users to upload arbitrary files, ultimately resulting in the upload and execution of PHP code.
KEV Jul 7, 2026 -
Critical 10.0
Joomla Extension - icagenda.com - Remote Code Execution in iCaganda extension for Joomla < 4.0.8/3.9.15
A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
KEV Jul 10, 2026 -
Critical 9.8
FileRise shared-folder upload path traversal allows arbitrary file write and admin takeover
FileRise before 3.16.0 is vulnerable to path traversal in the shared-folder upload endpoint (/api/folder/uploadToSharedFolder.php), leading to arbitrary file write and administrator account takeover. The upload filename is validated by FolderController with b…
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Critical 9.0
WordPress SigmaForms Pro – AI Generated Forms plugin <= 1.4.5 - Arbitrary File Upload vulnerability
Unauthenticated Arbitrary File Upload in SigmaForms Pro – AI Generated Forms <= 1.4.5 versions.
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Critical 9.9
WordPress Charity Zone theme <= 1.1.1 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Charity Zone <= 1.1.1 versions.
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Critical 9.9
WordPress Kids Gift Shop theme <= 0.5.4 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Kids Gift Shop <= 0.5.4 versions.
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Critical 9.9
WordPress Ecommerce Zone theme <= 0.9.7 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Ecommerce Zone <= 0.9.7 versions.
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Critical 9.9
WordPress Restaurant Zone theme <= 0.7.8 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Restaurant Zone <= 0.7.8 versions.
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Critical 9.9
WordPress Webenvo theme <= 0.0.6 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Webenvo <= 0.0.6 versions.
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Critical 9.9
WordPress Unlimited Elements for Elementor (Premium) plugin <= 2.0.6 - Arbitrary File Upload vulnerability
Contributor Arbitrary File Upload in Unlimited Elements for Elementor (Premium) <= 2.0.6 versions.
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Critical 9.9
WordPress WishList Member X plugin <= 3.29.0 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in WishList Member X <= 3.29.0 versions.
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Critical 9.9
WordPress Restaurt theme <= 1.0.4 - Arbitrary File Upload vulnerability
Subscriber Arbitrary File Upload in Restaurt <= 1.0.4 versions.
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Critical 10.0
WordPress WordPress & WooCommerce Scraper Plugin, Import Data from Any Site plugin <= 1.0.7 - Arbitrary File Upload vulnerability
Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7 versions.
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Critical 9.9
WordPress PT Luxa Addons Plugin <= 1.2.2 - Arbitrary File Upload Vulnerability
Subscriber Arbitrary File Upload in PT Luxa Addons <= 1.2.2 versions.