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TI-2026-80310 Aliases CVE-2026-116254GHSA-2869-hc7g-hw5v

Origin validation error in rathena FluxCP PayPal IPN handler

Priority HIGH 70CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

rathena FluxCP up to commit 98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d validates the origin of PayPal IPN notifications incorrectly in verifyiprange (CWE-346). It trusts the client-supplied X-Real-IP header when checking the sender's IP range. A remote attacker without privileges can send a crafted header to affect payment notifications, with partial integrity and availability impact. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00261 17th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
rathenaFluxCP98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d—No fix listedCNA
  • FluxCP Vendorrathena Affected 98cd4b8fd83228c11b36fb3d097b8e0f7c105a8d Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:rathena:fluxcp:*:*:*:*:*:*:*:*——rathena
  • cpe:2.3:a:rathena:fluxcp:*:*:*:*:*:*:*:* Versions — — ·rathena

Remediation

No fixed version is listed for FluxCP.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-116254
  2. 2026-10-26 Priority changed: MEDIUM → LOW
  3. 2026-10-27 Alias added: GHSA-2869-hc7g-hw5v
  4. 2026-10-31 CISA SSVC decision points changed
  5. 2026-10-31 Priority changed: LOW → HIGH

References

Exploit 1

  • TI-2025-38980 CSRF in FluxCP account endpoints allows account takeover / state-changing actions CVSS 4.0HIGH 8.6
  • TI-2025-36205 rAthena has heap-based buffer overflow in login server CVSS 3.1CRITICAL 9.8
  • TI-2025-36206 rAthena has SQL Injection in PartyBooking component via `WorldName` parameter. CVSS 3.1CRITICAL 9.8
  • TI-2025-36408 rAthena missing bound check in chclif_parse_moveCharSlot CVSS 3.1CRITICAL 9.1
  • TI-2024-30766 Javascript Injection in Vending Info/Buyers Info Module in FluxCP CVSS 3.1HIGH 7.3
  • TI-2025-38488 rAthena map-server use-after-free vulnerability in RODEX CVSS 3.1HIGH 7.5
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences