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Findings

CVE-2026-2888

The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28.

Published Mar 13, 2026 · updated Jun 17, 2026

The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28. This is due to the AJAX handler ( ) overwriting the global data with attacker-controlled JSON input and then using those values to recalculate payment amounts via field shortcode resolution in . The handler relies on a nonce that is publicly exposed in the page's JavaScript ( ), which provides CSRF protection but not authorization. This makes it possible for unauthenticated attackers to manipulate PaymentIntent amounts before payment completion on forms using dynamic pricing with field shortcodes, effectively paying a reduced amount for goods or services.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 13, 2026 · NIST NVD

    Detected

    The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28. This is due to the AJAX handler ( ) overwriting the global data with attacker-controlled JSON input and then using those values to recalculate payment amounts via field shortcode resolution in . The handler relies on a nonce that is publicly exp

  2. Jun 17, 2026 · NIST NVD

    Updated

    The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28. This is due to the AJAX handler ( ) overwriting the global data with attacker-controlled JSON input and then using those values to recalculate payment amounts via field shortcode resolution in . The handler relies on a nonce that is publicly exp

Sources

  • NIST NVDVulnerability recordCVE-2026-2888

    The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28. This is due to the AJAX handler ( ) overwriting the global data with attacker-c

    nvd.nist.gov

References