Unknown Wp Express Checkout vulnerabilities

2 CVEs affecting Unknown Wp Express Checkout, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-83537, published 2026-09-09.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2026-83537, published 2026-09-09. Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days. 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…
• CVE-2026-83533, published 2026-09-02. Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days. The WP Express Checkout WordPress plugin before 2.4.9 does not verify server-side that a payment was actually completed before marking an order as paid, allowing unauthenticated users to forge a…