sh1zen Multi Uploader for Gravity Forms Plugin up to 1.1.9 on WordPress move_file unrestricted upload

Summaryinfo

A vulnerability classified as critical was found in sh1zen Multi Uploader for Gravity Forms Plugin up to 1.1.9. Affected by this issue is the function move_file. The manipulation results in unrestricted upload. This vulnerability was named CVE-2026-87796. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in sh1zen Multi Uploader for Gravity Forms Plugin up to 1.1.9. Affected is the function move_file. 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. CVE summarizes:

The Multi Uploader for Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.1.9 via the move_file function. This is due to insufficient file type validation during chunked upload handling. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-87796 since 09/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/17/2026). The MITRE ATT&CK project declares the attack technique as T1608.002.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-81335). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• sh1zen

Name

• Multi Uploader for Gravity Forms Plugin

Version

• 1.1.0
• 1.1.1
• 1.1.2
• 1.1.3
• 1.1.4
• 1.1.5
• 1.1.6
• 1.1.7
• 1.1.8
• 1.1.9

CPE 2.3info

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CPE 2.2info

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• 🔒

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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