Payment Notification Forgery Vulnerability in PayHere Payment Gateway Plugin for WordPress
CVE-2026-103310

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Payhere Payment Gateway
Vendor
CVE Published:
2 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103310?

The PayHere Payment Gateway plugin for WordPress, versions 2.4.0 to 2.4.5, has a security flaw that allows attackers to forge payment notifications. This happens when the merchant secret is not set, which is the default configuration. As a result, unauthorized individuals can mark any order as paid without actual payment being processed, potentially leading to significant financial losses for merchants.

Affected Version(s)

PayHere Payment Gateway 2.4.0 <= 2.4.5

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-2026-103310 - Proof of Concept

References

https://wpscan.com/vulnerability/f3b66147-5910-4901-b595-...
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

Naoki Kawahigashi
WPScan
.