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Advisory record · GHSA-mmw7-wq3c-wf9p

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

CVSS 6.5 MediumEPSS 0.0018 · 7th percentile

Published by the GitHub Advisory Database at 8 Apr 2026, 00:08 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
wwbn/avideoPackagist<=26.0No fixed version yet
Identifiers
GHSA-mmw7-wq3c-wf9p · CVE-2026-39366 · PKSA-1dhf-r34w-p2f7
Weakness (CWE)
CWE-345
Tags
Published
8 Apr 2026
Updated
8 Apr 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The PayPal IPN v1 handler (plugin/PayPalYPT/ipn.php) in WWBN AVideo, affected through version 26.0, does not check whether a transaction has already been processed. An attacker who obtains one legitimate IPN notification can replay it to repeatedly credit their wallet balance and extend subscriptions, gaining paid content without further payment. No fix is listed in the source, and the source gives no workaround beyond migrating to the newer handlers.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0018, the 7th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:25 UTC First seen by agentprime
  2. 31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.