CVE-2026-39366Public exploitNetwork attack vector

Wallet inflation via replayed PayPal IPN notifications

Published Apr 7, 2026 · Updated Apr 7, 2026

PayPal IPN replay in World Wide Broadcast Network AVideo 26.0 and earlier allows remote authenticated users to inflate wallet balances. plugin/PayPalYPT/ipn.php validates repeated notifications with PayPal but credits addBalance() and renews subscriptions without checking or recording a unique transaction. Exploitation requires a registered account, one completed PayPal subscription, and its genuine IPN body; each replay adds the paid amount and extends access.

CVSS severity6.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PayPal IPN replay in World Wide Broadcast Network AVideo 26.0 and earlier allows remote authenticated users to inflate wallet balances. plugin/PayPalYPT/ipn.php validates repeated notifications with PayPal but credits addBalance() and renews subscriptions without checking or recording a unique transaction. Exploitation requires a registered account, one completed PayPal subscription, and its genuine IPN body; each replay adds the paid amount and extends access.

The record

CVE
CVE-2026-39366
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
World Wide Broadcast Network
Product
AVideo
Classifications
CWE-345, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

World Wide Broadcast Network · AVideoversion=<= 26.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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