WPMUDEV Forminator Forms Plugin up to 1.57.2 on WordPress postdata-1[post-custom] cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in WPMUDEV Forminator Forms Plugin up to 1.57.2. Affected by this issue is some unknown functionality. This manipulation of the argument postdata-1[post-custom] causes cross site scripting. This vulnerability is tracked as CVE-2026-92144. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in WPMUDEV Forminator Forms Plugin up to 1.57.2. It has been declared as problematic. Affected by this vulnerability is an unknown functionality. The manipulation of the argument postdata-1[post-custom] with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'postdata-1[post-custom]' Parameter in all versions up to, and including, 1.57.2 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 required form submission nonce is freely obtainable by unauthenticated users via the publicly accessible wp_ajax_nopriv_forminator_get_nonce endpoint, making the full attack chain exploitable without any authentication or prior account.

It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-92144 since 09/15/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• WPMUDEV

Name

• Forminator Forms Plugin

Version

• 1.57.0
• 1.57.1
• 1.57.2

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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