Vulnerability · Published Sep 9, 2026 · Assigned by WPScan
CVE-2026-83537WP Express Checkout < 2.5.0 - Unauthenticated Payment Bypass via wpec_process_empty_payment
Medium 5.3
In plain English
A medium-severity insufficient verification of data authenticity in WP Express Checkout from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 94.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The WP Express Checkout WordPress plugin before 2.5.0 does not verify server-side that a payment was actually completed before marking an order as paid, allowing unauthenticated users to forge a completed order without paying.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | WP Express Checkout | 0 – before 2.5.0 |
Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://wpscan.com/vulnerability/02b39e4f-181d-4573-9175-bf5a6d71e531/ exploit, vdb-entry, technical-description