---
id: CVE-2026-116254
title: >-
  rathena FluxCP PayPal IPN PaymentNotifyRequest.php verifyiprange origin
  validation
summary: >-
  A vulnerability was identified in rathena FluxCP up to
  98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d. This issue affects the function
  verifyiprange of the file lib/Flux/PaymentNotifyRequest.php of the component
  PayPal IPN Handler. The manipul…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:C'
cvssSource: cna
cwe:
  - CWE-346
  - CWE-345
vendor: rathena
product: FluxCP
affected:
  - FluxCP 98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T09:45:18.399Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116254'
references:
  - url: 'https://vuldb.com/vuln/426288'
    label: >-
      VDB-426288 | rathena FluxCP PayPal IPN PaymentNotifyRequest.php
      verifyiprange origin validation
  - url: 'https://vuldb.com/vuln/426288/cti'
    label: 'VDB-426288 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-116254'
    label: CVE-2026-116254 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1009729'
    label: >-
      Submit #1009729 | rathena FluxCP master branch, commit 98cd4b8
      (2025-11-03) CWE-346 Origin Validation Error
  - url: 'https://gist.github.com/qianqiusujiu/2a57c3721116efc6fe7c20b41ad68a5d'
tags:
  - cve.org
ingestedAt: '2026-10-26T10:23:42.837Z'
---

## Overview

A vulnerability was identified in rathena FluxCP up to 98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d. This issue affects the function verifyiprange of the file lib/Flux/PaymentNotifyRequest.php of the component PayPal IPN Handler. The manipulation of the argument X-Real-IP leads to origin validation error. The attack is possible to be carried out remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

## Affected

- `FluxCP 98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.