CVE-2026-4986

WPForms Lite <= 1.10.0.4 - Unauthenticated Payment Bypass

2026-05-19 00:00

Strategic Overview

Status: Patched in 1.10.0.5
Affected Plugin: WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More
Affected Version: <= 1.10.0.4
CVSS: 5.3Medium
Weakness type: CWE-602 · Client-Side Enforcement of Server-Side Security
CVE: CVE-2026-4986

View all WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More vulnerabilities

At a glance

CVE-2026-4986 is a medium-severity Client-Side Enforcement of Server-Side Security vulnerability in the WPForms WordPress plugin, affecting versions <= 1.10.0.4. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.10.0.5; sites on affected versions should update now. Disclosed May 2026, reported by Sudhanshu Chauhan.

Vulnerability Overview

The WPForms Lite plugin for WordPress is vulnerable to Payment Bypass in versions up to, and including, 1.10.0.4. This is due to a a lack of verification on PayPal webhooks. This makes it possible for unauthenticated attackers to bypass payment.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-602: Client-Side Enforcement of Server-Side Security

The product is composed of a server that relies on the client to implement a mechanism that is intended to protect the server.

Remediation

Update to version 1.10.0.5, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: WPForms 1.10.0.5 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-4986 https://www.wordfence.com/threat-intel/vulnerabilities/id/705ee791-6b12-47bc-9de1-09b91a55bd00 https://nvd.nist.gov/vuln/detail/CVE-2026-4986

Related records

Other vulnerabilities in WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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