Underpayment via client-controlled checkout amount
Published Oct 2, 2026 · Updated Oct 2, 2026
Payment amount manipulation in Scott Paterson Easy PayPal & Stripe Buy Now Button 1.8 through 2.0.5 allows remote attackers to underpay for purchases. The checkout flow accepts a client-supplied amount instead of deriving the price from server-side product settings. An unauthenticated buyer can change the submitted amount; the reported consequence is underpayment, not access to site administration or payment credentials.
Summary
What happened
Payment amount manipulation in Scott Paterson Easy PayPal & Stripe Buy Now Button 1.8 through 2.0.5 allows remote attackers to underpay for purchases. The checkout flow accepts a client-supplied amount instead of deriving the price from server-side product settings. An unauthenticated buyer can change the submitted amount; the reported consequence is underpayment, not access to site administration or payment credentials.
The record
- CVE
- CVE-2026-90987
- Published
- Oct 2, 2026
- Updated
- Oct 2, 2026
- Vendor
- Scott Paterson
- Product
- Easy PayPal & Stripe Buy Now Button
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 2, 2026CVE publishedPublication date reported by the CVE source.
- Oct 2, 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=1.8 <2.0.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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