---
id: "CVE-2026-123486"
page: "https://infrastack.ai/live/CVE-2026-123486"
kind: "vulnerability"
aliases: ["CVE-2026-123486"]
title: "WWBN AVideo: PayPal payment notice race lets replays double-credit wallets"
severity: "medium"
cvss: 6.0
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["avideo", "other", "paypal", "php", "video-platform"]
not_affected_if: ["plugin-disabled", "version-outside-range"]
published_at: "2026-11-06T15:17:17+00:00"
first_seen_at: "2026-11-06T15:42:43+00:00"
updated_at: "2026-11-06T15:44:33+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123486", "first_seen_at": "2026-11-06T15:42:43+00:00"}]
exploit_sources: []
---

# WWBN AVideo: PayPal payment notice race lets replays double-credit wallets

Link for people: https://infrastack.ai/live/CVE-2026-123486 (this .md is for agents)

WWBN AVideo versions 29.0 through 29.4.0 have a race condition in the PayPal IPN handler (plugin/PayPalYPT/ipn.php) where the duplicate-payment check and the insert are not atomic. An attacker who captures a valid recurring-payment notification can replay it concurrently to receive duplicate wallet credits and subscription renewals.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed AVideo version; affected range is `29.0` through `29.4.0`.
- Look for the PayPal plugin at `plugin/PayPalYPT/ipn.php` and confirm whether the PayPalYPT plugin is enabled.

## Timeline

- 2026-11-06T15:42:43+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123486

## Documents

- [advisory] Vendor advisory: github.com https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/wwbn-avideo-29.0-through-29.4.0-race-condition-in-paypal-ipn-deduplication-via-ipn-php

## From the sources

WWBN AVideo 29.0 through 29.4.0 contains a race condition vulnerability in plugin/PayPalYPT/ipn.php that allows attackers to bypass IPN replay protection due to a non-atomic deduplication check and insert. Attackers can concurrently replay a captured valid recurring-payment notification so both requests pass isRecurringPaymentIdUsed(), obtaining duplicate wallet credits and subscription renewals.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_