WPMU DEV Forminator Forms Plugin up to 1.56.1 on WordPress Select Field sanitize_array cross site scripting

Summaryinfo

A vulnerability categorized as problematic has been discovered in WPMU DEV Forminator Forms Plugin up to 1.56.1. This impacts the function Forminator_Core::sanitize_array of the component Select Field. Such manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-18325. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in WPMU DEV Forminator Forms Plugin up to 1.56.1. It has been rated as problematic. Affected by this issue is the function Forminator_Core::sanitize_array of the component Select Field. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Forged Upload Record via Select Field in all versions up to, and including, 1.56.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit is possible because Forminator_Core::sanitize_array() skips all filtering for keys prefixed with 'select-', and set_field_data() treats a submitted 'return' member as a trusted internal flag — allowing an unauthenticated attacker to forge and persist a complete upload field record with an arbitrary file_url value without any sanitization or validation.

The advisory is available at wordfence.com. This vulnerability is handled as CVE-2026-18325 since 07/29/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• WPMU DEV

Name

• Forminator Forms Plugin

Version

• 1.56.0
• 1.56.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion