Is CVE-2026-2428 actively exploited?

No active exploitation of CVE-2026-2428 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-2428 be exploited remotely?

Yes. CVE-2026-2428 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-2428?

CVE-2026-2428 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-2428

HIGH

CVE-2026-2428

CWE-345Published: February 27, 2026· Updated: Feb 27, 2026

7.5

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:4.2th

Official Description

The Fluent Forms Pro Add On Pack plugin for WordPress is vulnerable to Insufficient Verification of Data Authenticity in all versions up to, and including, 6.1.17. This is due to the PayPal IPN (Instant Payment Notification) verification being disabled by default (`disable_ipn_verification` defaults to `'yes'` in `PayPalSettings.php`). This makes it possible for unauthenticated attackers to send forged PayPal IPN notifications to the publicly accessible IPN endpoint, marking unpaid form submissions as "paid" and triggering post-payment automation (emails, access grants, digital product delivery).

NVD Source

Technical Analysis

CVE-2026-2428 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.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.