Unauthenticated payment bypass via unchecked PDT amount
Published Aug 10, 2026 · Updated Aug 10, 2026
Payment bypass in Accept PayPal & Stripe with Subscriptions for WooCommerce 3.1.0 and earlier allows remote attackers to underpay orders. The PayPal Data Transfer return handler accepts PayPal's completed status and marks the WooCommerce order paid without comparing the transaction amount with the stored order total. Exploitation requires PDT to be enabled with a valid identity token and functional postbacks, and it changes order integrity without disclosing data or interrupting service.
Summary
What happened
Payment bypass in Accept PayPal & Stripe with Subscriptions for WooCommerce 3.1.0 and earlier allows remote attackers to underpay orders. The PayPal Data Transfer return handler accepts PayPal's completed status and marks the WooCommerce order paid without comparing the transaction amount with the stored order total. Exploitation requires PDT to be enabled with a valid identity token and functional postbacks, and it changes order integrity without disclosing data or interrupting service.
The record
- CVE
- CVE-2026-17016
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- Scott Paterson
- Product
- Accept PayPal & Stripe with Subscriptions for WooCommerce
- Classifications
- CWE-284, T1565
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 10, 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.
- Affected versionversion=0 <=3.1.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Public exploit references
- WPScan PDT underpayment proof of conceptproof of concept · validated
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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