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CVE-2026-83537

WP Express Checkout < 2.5.0 - Unauthenticated Payment Bypass via wpec_process_empty_payment

MEDIUM
5.3
CVSS Score
Published: September 9, 2026 at 06:25 AM UTC
Updated: September 9, 2026 at 05:27 PM UTC
1 product affected across 1 vendorWP Express Checkout

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

WP Express Checkout· Tipsandtricks Hqwordpress-plugin
60%
v < 2.5.0
Affected range stops below 2.5.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description
Source: cverecord
https://wpscan.com/vulnerability/02b39e4f-181d-4573-9175-bf5a6d71e531/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMWPScan
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-345

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