melograno The Innovative Form Builder Plugin up to 1.5.1 on WordPress Allowed-Extensions Sanitizer submission filterFiletypeAndExt unrestricted upload

Summaryinfo

A vulnerability identified as problematic has been detected in melograno The Innovative Form Builder Plugin up to 1.5.1. This affects the function filterFiletypeAndExt of the file /wp-json/ivyforms/v1/form/submission/ of the component Allowed-Extensions Sanitizer. Performing a manipulation results in unrestricted upload. This vulnerability is reported as CVE-2026-109384. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in melograno The Innovative Form Builder Plugin up to 1.5.1. This affects the function filterFiletypeAndExt of the file /wp-json/ivyforms/v1/form/submission/ of the component Allowed-Extensions Sanitizer. The manipulation with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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 dangerous-extension denylist in the allowed-extensions sanitizer and deliberate override of WordPress's native MIME and extension defences via a registered wp_check_filetype_and_ext filter. This makes it possible for authenticated attackers, with custom-level access and above, to upload files that may be executable, which makes remote code execution possible. An authenticated attacker with the custom add_edit_forms capability must first configure a File Upload field with a dangerous extension (e.g., php) in the allowed-extensions list; once that form is published, any unauthenticated visitor can trigger the actual file upload via the publicly accessible /wp-json/ivyforms/v1/form/submission/ REST route.

The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-109384 since 10/12/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/28/2026). MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• melograno

Name

• The Innovative Form Builder Plugin

Version

• 1.5.0
• 1.5.1

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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