Vulnerability · Published Oct 26, 2026 · Assigned by VulDB

CVE-2026-116254rathena FluxCP PayPal IPN PaymentNotifyRequest.php verifyiprange origin validation

Medium 6.5

In plain English

A medium-severity insufficient verification of data authenticity in FluxCP from rathena. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 82.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
rathena	FluxCP	98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d

Weakness: CWE-346, CWE-345 · Vector: 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

References

VDB-426288 | rathena FluxCP PayPal IPN PaymentNotifyRequest.php verifyiprange origin validation vdb-entry, technical-description
VDB-426288 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-116254 | CVE Analysis and Report third-party-advisory
Submit #1009729 | rathena FluxCP master branch, commit 98cd4b8 (2025-11-03) CWE-346 Origin Validation Error third-party-advisory
https://gist.github.com/qianqiusujiu/2a57c3721116efc6fe7c20b41ad68a5d exploit