GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
Common Weakness Enumeration

CWE-434

Allowed

Unrestricted Upload of File with Dangerous Type

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

6247 vulnerabilities reference this CWE, most recent first.

CVE-2026-58480 (GCVE-0-2026-58480)

Vulnerability from cvelistv5 – Published: 2026-07-08 13:05 – Updated: 2026-07-14 22:03 X_Open Source X_Known Exploited Vulnerability
VLAI
Title
Blocksy Companion Pro < 2.1.47 Unauthenticated File Upload via save_attachments
Summary
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 Advanced Reviews feature. Attackers can exploit the Custom Fonts extension's flawed strpos() substring check by uploading double-extension filenames such as shell.woff2.php, causing the validation to pass on the substring match while the web server executes the file as PHP, achieving remote code execution.
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:42 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
Creative Themes Blocksy Companion Affected: 0 , ≤ 2.1.46 (semver)
Unaffected: 2.1.47 (semver)
    cpe:2.3:a:creativethemes:blocksy_companion:*:*:*:*:*:wordpress:*:*
Create a notification for this product.
Date Public
2026-07-01 00:00
Credits
Nguyen Ba Khanh
Show details on NVD website
To clipboard 

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CVE-2026-58428 (GCVE-0-2026-58428)

Vulnerability from cvelistv5 – Published: 2026-08-13 16:44 – Updated: 2026-08-14 17:29
VLAI
Title
Release attachment extension allowlist bypass via web release edit form (variant of CVE-2025-68939)
Summary
Release attachment extension allowlist bypass via web release edit form (variant of CVE-2025-68939)
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 17:29 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Gitea Gitea Open Source Git Server Affected: 0 , ≤ 1.26.4 (semver)
Create a notification for this product.
Credits
bl4cksku11
Show details on NVD website
To clipboard 

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CVE-2026-58409 (GCVE-0-2026-58409)

Vulnerability from cvelistv5 – Published: 2026-07-13 20:05 – Updated: 2026-07-14 13:06
VLAI
Title
ChurchCRM: Authenticated Remote Code Execution (RCE) via Malicious Plugin Upload
Summary
ChurchCRM is an open-source church management system. Prior to version 7.4.0, an authenticated administrator can achieve Remote Code Execution (RCE) on the server by installing a malicious plugin ZIP archive containing a PHP webshell. The application explicitly includes 'php' in its ALLOWED_EXTENSIONS list, while the dangerous extensions denylist (DENIED_EXTENSIONS) fails to block standard .php files. Because `php` is explicitly included in the allowed extension list for plugin archives, and extracted files are placed directly under the web root, any PHP file inside the ZIP becomes immediately executable via HTTP — without even needing to "enable" the plugin through the application UI. The /plugins/install-url API route (management.php) allows an administrator to source the malicious ZIP from any attacker-controlled HTTPS URL, validating it only against an attacker-supplied SHA-256 hash. This issue has been fixed in version 7.4.0.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 13:06 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
ChurchCRM CRM Affected: < 7.4.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-57828 (GCVE-0-2026-57828)

Vulnerability from cvelistv5 – Published: 2026-07-11 09:27 – Updated: 2026-08-19 14:44
VLAI
Title
Joomla Extension - phoca.cz - Authenticated file upload in Phoca Downloads component < 6.1.3
Summary
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 full RCE.
Severity
9 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-13 15:42 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Credits
Phil Taylor, mysites.guru
Show details on NVD website
To clipboard 

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CVE-2026-57827 (GCVE-0-2026-57827)

Vulnerability from cvelistv5 – Published: 2026-07-11 09:29 – Updated: 2026-08-12 13:58
VLAI
Title
Joomla Extension - rsjoomla.com - Unauthenticated file upload in RSFiles component < 1.17.12
Summary
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.
Severity
10 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-13 15:43 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Credits
Phil Taylor, mysites.guru
Show details on NVD website
To clipboard 

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CVE-2026-57719 (GCVE-0-2026-57719)

Vulnerability from cvelistv5 – Published: 2026-07-13 08:41 – Updated: 2026-07-13 16:07
VLAI
Title
WordPress Aimogen Pro plugin <= 2.8.3 - Arbitrary File Upload vulnerability
Summary
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.
Severity
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-13 14:15 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
CodeRevolution Aimogen Pro Affected: 0 , ≤ 2.8.3 (custom)
Create a notification for this product.
Date Public
2026-07-13 10:37
Credits
0xd4rk5id3 | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-57710 (GCVE-0-2026-57710)

Vulnerability from cvelistv5 – Published: 2026-07-13 08:41 – Updated: 2026-07-13 16:07
VLAI
Title
WordPress WoowBot Pro Max plugin <= 14.1.7 - Arbitrary File Upload vulnerability
Summary
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.
Severity
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-13 14:14 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
quantumcloud WoowBot Pro Max Affected: 0 , ≤ 14.1.7 (custom)
Create a notification for this product.
Date Public
2026-07-13 10:37
Credits
Jamaal ahmed | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-57700 (GCVE-0-2026-57700)

Vulnerability from cvelistv5 – Published: 2026-06-25 17:29 – Updated: 2026-06-29 17:43
VLAI
Title
WordPress OMGF Pro plugin <= 5.2.6 - Arbitrary File Upload vulnerability
Summary
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.
Severity
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 17:43 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
Daan.dev OMGF Pro Affected: n/a , ≤ 5.2.6 (custom)
Create a notification for this product.
Credits
NETZLICHT | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-57658 (GCVE-0-2026-57658)

Vulnerability from cvelistv5 – Published: 2026-06-26 14:53 – Updated: 2026-06-26 15:31
VLAI
Title
WordPress TemplateSpare plugin <= 4.2.0 - Arbitrary File Upload vulnerability
Summary
Administrator Arbitrary File Upload in TemplateSpare <= 4.2.0 versions.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 15:31 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
Templatespare TemplateSpare Affected: n/a , ≤ 4.2.0 (custom)
Create a notification for this product.
Credits
Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-57311 (GCVE-0-2026-57311)

Vulnerability from cvelistv5 – Published: 2026-07-20 12:53 – Updated: 2026-07-29 09:42
VLAI
Title
Unrestricted Upload of File with Dangerous Type in Windu CMS
Summary
Windu CMS does not validate types of uploaded files. An authenticated attacker can upload arbitrary files, including PHP. This can lead to Remote Code Execution. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 4.1 but may also affect other versions.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 13:45 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
URL Tags
https://cert.pl/posts/2026/07/CVE-2026-57309 third-party-advisory
https://windu.org product
Impacted products
Vendor Product Version
JCD Windu CMS Affected: 4.1 (custom)
Create a notification for this product.
Date Public
2026-07-20 00:00
Credits
Jakub Lipiński Marek Tołczyk Kamil Królikowski Karol Czubernat
Show details on NVD website
To clipboard 

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Mitigation
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]

Mitigation MIT-21
Architecture and Design

Strategy: Enforcement by Conversion

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.

Mitigation
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]

Mitigation MIT-5
Implementation

Strategy: Input Validation

  • 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.
Mitigation
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.

Mitigation
Implementation

Strategy: Input Validation

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]

Mitigation
Implementation

When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.

Mitigation MIT-15
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.

Mitigation
Implementation

Do not rely exclusively on sanity checks of file contents to ensure that the file is of the expected type and size. It may be possible for an attacker to hide code in some file segments that will still be executed by the server. For example, GIF images may contain a free-form comments field.

Mitigation
Implementation

Do not rely exclusively on the MIME content type or filename attribute when determining how to render a file. Validating the MIME content type and ensuring that it matches the extension is only a partial solution.

Mitigation MIT-17
Architecture and Design Operation

Strategy: Environment Hardening

Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.

Mitigation MIT-22
Architecture and Design Operation

Strategy: Sandbox or Jail

  • Run the code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.
CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs

In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to.

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