Is CVE-2026-4160 actively exploited?

No active exploitation of CVE-2026-4160 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4160 be exploited remotely?

Yes. CVE-2026-4160 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4160?

CVE-2026-4160 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-4160

CWE-639Published: April 16, 2026· Updated: Apr 22, 2026

5.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:7.7th

Official Description

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").

NVD Source

Technical Analysis

CVE-2026-4160 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.