Threat intelligence

Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder <= 6.1.21 - Insecure Direct Object Reference in Stripe SCA Confirmation to Unauthenticated Payment Status Modification

CVE-2026-4160 · fluentform

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Fluentform at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder <= 6.1.21 - Insecure Direct Object Reference in Stripe SCA Confirmation to Unauthenticated Payment Status Modification
Affected software: fluentform(Plugin)
Affected versions: ≥ 6.1.21 and ≤ 6.1.21
Authentication: Unauthenticated
Vulnerability type: Other
CVE: CVE-2026-4160
Published: 16 April 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: This advisory describes a other issue in the affected software. Review the source advisory and your installed version to assess exposure.
Source: Data imported from Wordfence Intelligence (advisory 154fc656-3a33-4783-a941-10bb848244b3). Methodology and redistribution notes

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