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    CVE-2026-4160

    The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'submission_id' parameter in versions up to, and including, 6.1.21. This is due to missing authorization and ownership validation on a user controlled key in the Stripe SCA confirmation AJAX endpoint. This makes it possible for unauthenticated attackers to modify payment status of targeted pending submissions (for example, setting the status to "failed").

    Published:Apr 16, 2026
    Last Modified:Apr 22, 2026
    EPS:Apr 16, 2026
    EPSS Score:0.00037
    CVSS Score:5.3

    Affected Products

    Vendor
    Techjewel
    Product
    Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
    Vendor
    Wordpress
    Product
    Wordpress

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High