Webhook Authentication Bypass in WPForms Plugin by WordPress
CVE-2026-4986

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
WPforms
Vendor
CVE Published:
9 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4986?

The WPForms plugin for WordPress, prior to version 1.10.0.5, contains a security flaw that allows unauthenticated attackers to manipulate payment transactions by forging PayPal webhook payloads. This vulnerability arises from the plugin's failure to verify the authenticity of incoming webhook events before processing, posing significant risks for users relying on this payment integration. It is essential for administrators to update to the latest version to mitigate potential exploitation and safeguard payment processes.

Affected Version(s)

WPForms 1.10.0.1 < 1.10.0.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-4986 - Proof of Concept

References

https://wpscan.com/vulnerability/1d99eed6-9a16-4d5a-90f9-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sudhanshu Chauhan [RedHunt Labs]
WPScan
.