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  4. CVE 2026 83533 wp express checkout 249 unauthenticated payment
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-83533

WP Express Checkout < 2.4.9 - Unauthenticated Payment Bypass via wpec_process_paymentCVE-2026-83533

Answer in brief

CVE-2026-83533 records a Medium severity (CVSS 5.3) vulnerability in WP Express Checkout < 2.4.9 - Unauthenticated Payment Bypass via wpec_process_payment. The current sources do not mark it as known exploited. The current feed maps Unknown/WP Express Checkout (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 2, 2026Updated Sep 3, 2026Source checked Oct 17, 2026First seen by HOL Sep 2, 2026Material review Sep 3, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/WP Express Checkout (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unknown/WP Express Checkoutgeneric>=0 <2.4.92.4.9

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/WP Express Checkout.
  2. 2Review the reported fix. Update Unknown/WP Express Checkout to 2.4.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 2, 2026

Sources and claim methodology

  • Source referencewpscan.com
Upstream source description

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 completed order without paying.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • European VAT Compliance Assistant for WooCommerce <= 1.36.10 - Unauthenticated Stored Cross-Site Scripting via CF-IPCountry HeaderSame generic ecosystem
  • PeachPay 1.117.9 - 1.120.69 - Unauthenticated Order Key Disclosure via ConvesioPay BTCPay Status CheckSame generic ecosystem
  • EU VAT Assistant for WooCommerce <= 2.1.30.260413 - Unauthenticated Stored Cross-Site Scripting via 'vat_number' ParameterSame generic ecosystem
  • Ukr-To-Lat <= 1.3.5 - Contributor+ SQLi via Term NameSame generic ecosystem
  • Contact Form 7 Signature Addon <= 4.2.2 - Unauthenticated Arbitrary File Read via Path Traversal in Email AttachmentsSame generic ecosystem
  • Kirki <= 6.3.2 - Authenticated (Administrator+) PHP Object Injection via Deserialization of Untrusted Input via ZIP Template ImportSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-345
Source
CVE List V5
Source checked
Oct 17, 2026
References
1 linked source
Open source record