CVE-2026-116254: rathena FluxCP PayPal IPN PaymentNotifyRequest.php verifyiprange origin validation
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 Software
Event History
Frequently Asked Questions
What does an attacker need to exploit this issue?
The attack can be performed remotely and requires no privileges or user interaction according to the supplied vector. Exploitation involves manipulating the X-Real-IP argument used by the PayPal IPN Handler's verifyiprange function.
Which deployments should be considered affected?
rAthena FluxCP versions up to commit 98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d are identified as affected. The affected component is the PayPal IPN Handler in lib/Flux/PaymentNotifyRequest.php.
How likely is exploitation?
A public exploit is available and may be used. The supplied rating also marks exploit maturity as proof-of-concept.