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CVE-2026-39366— WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php

Quick assessment

Affected
WWBN AVideo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WWBN AVideo是WWBN团队的一个由PHP编写的视频平台建站系统。 WWBN AVideo 26.0及之前版本存在数据伪造问题漏洞，该漏洞源于PayPal IPN v1处理程序缺少交易去重，可能导致攻击者重放通知以重复增加余额。

CVSS 6.5 · Medium EPSS 0.19% · P7

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-39366

Vulnerability Information
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Vulnerability Title
WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php
Source: CVE Program / CVE List V5
Vulnerability Description
WWBN AVideo is an open source video platform. In versions 26.0 and prior, the PayPal IPN v1 handler at plugin/PayPalYPT/ipn.php lacks transaction deduplication, allowing an attacker to replay a single legitimate IPN notification to repeatedly inflate their wallet balance and renew subscriptions. The newer ipnV2.php and webhook.php handlers correctly deduplicate via PayPalYPT_log entries, but the v1 handler was never updated and remains actively referenced as the notify_url for billing plans.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
WWBN AVideo 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WWBN AVideo是WWBN团队的一个由PHP编写的视频平台建站系统。 WWBN AVideo 26.0及之前版本存在数据伪造问题漏洞，该漏洞源于PayPal IPN v1处理程序缺少交易去重，可能导致攻击者重放通知以重复增加余额。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
WWBN AVideo <= 26.0 -

II. Public POCs for CVE-2026-39366

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III. Intelligence Information for CVE-2026-39366

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Patches & Fixes for CVE-2026-39366 (1)

Vendor Advisories for CVE-2026-39366 (1)

Same Patch Batch · WWBN · 2026-04-07 · 5 CVEs total

CVE-2026-39369 7.6 HIGH WWBN AVideo's GIF poster fetch bypasses traversal scrubbing and exposes local files throug
CVE-2026-39370 7.1 HIGH WWBN AVideo has an Allowlisted downloadURL media extensions bypass SSRF protection and en
CVE-2026-39368 6.5 MEDIUM WWBN AVideo has a Live restream log callback flow enabling stored SSRF to internal service
CVE-2026-39367 5.4 MEDIUM WWBN AVideo has Stored XSS via Malicious EPG XML Program Titles in AVideo EPG Page

IV. Related Vulnerabilities

Same product: AVideo
Same vendor: WWBN
Same weakness: CWE-345

V. Comments for CVE-2026-39366

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