Unauthenticated payment bypass via unbound payment reference
Published Jul 27, 2026 · Updated Jul 27, 2026
Payment authentication bypass in Clover Payment Gateway by Zaytech for WooCommerce before 1.3.6 allows remote attackers to mark orders paid. The check_order flow accepts an approved external payment reference without confirming that its order identifier and amount match the WooCommerce order. A single valid reference from any approved purchase is sufficient to complete other orders without paying their totals.
Summary
What happened
Payment authentication bypass in Clover Payment Gateway by Zaytech for WooCommerce before 1.3.6 allows remote attackers to mark orders paid. The check_order flow accepts an approved external payment reference without confirming that its order identifier and amount match the WooCommerce order. A single valid reference from any approved purchase is sufficient to complete other orders without paying their totals.
The record
- CVE
- CVE-2026-12493
- Published
- Jul 27, 2026
- Updated
- Jul 27, 2026
- Vendor
- Zaytech
- Product
- Clover Payment Gateway by Zaytech for WooCommerce
- Classifications
- CWE-287, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 27, 2026CVE publishedPublication date reported by the CVE source.
- Jul 27, 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 <1.3.6
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 check_order payment-reference replay 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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