CVE-2026-39366 — Insufficient Verification of Data Authenticity in Avideo

CWE-345 — Insufficient Verification of Data Authenticity4 documents4 sources
Severity
6.5MEDIUMNVD
EPSS
0.0%
top 96.47%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Wwbn Avideo
Timeline
PublishedApr 7
Latest updateApr 8

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NExploitability: 2.8 | Impact: 3.6

Affected Packages2 packages

▶CVEListV5wwbn/avideo26.0
▶Packagistwwbn/avideo26.0

🔴Vulnerability Details

2
GHSA
WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php↗2026-04-08
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OSV
WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php↗2026-04-08
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🕵️Threat Intelligence

1
Wiz
CVE-2026-39366 Impact, Exploitability, and Mitigation Steps | Wiz↗
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