Executive brief
Fluent Forms, a popular WordPress plugin used for creating and managing website forms, contains a security vulnerability that allows certain authorized users to inject malicious scripts into forms. An attacker with basic form-management permissions (such as a Contributor) could use this to target site visitors or administrators. If an administrator views a compromised form, the attacker could potentially gain full control over the plugin's settings and data, leading to unauthorized access to sensitive information or further site manipulation.
Technical details
A Stored Cross-Site Scripting (XSS) vulnerability exists in the Fluent Forms WordPress plugin before version 6.2.6. The issue stems from a failure to properly sanitize and escape the 'date_config' setting within the Date/Time form field before outputting it into an inline script during form rendering. An attacker with 'Contributor' privileges (who has been delegated form-management permissions) can inject malicious JavaScript into this configuration. When a site visitor or administrator views or previews the affected form, the script executes in their browser session. This can be leveraged to perform actions on behalf of an administrator, such as escalating the attacker's privileges within the plugin to 'fluentform_full_access'. The vulnerability is fixed in version 6.2.6.
Affected products
- WPManageNinja Fluent Forms < 6.2.6
Timeline
- 2026-07-13: disclosed: Initial public disclosure by researcher
- 2026-07-13: patched: Fix released in version 6.2.6
- 2026-07-30: advisory: NVD publication date