CVE-2026-84091Public exploitNetwork attack vectorHinoki check available

Unauthenticated payment confirmation forgery via Bit IPN

Published Sep 23, 2026 · Updated Sep 23, 2026

Improper authentication in SUMIT Payment Gateway for WooCommerce before 4.0.0 allows remote attackers to mark pending orders paid. The Bit IPN processing path trusts an inbound payment notification without confirming its authenticity with the payment provider before updating the linked WooCommerce order. No account is required; exploitation changes commerce state without completing payment, with no reported data disclosure or service interruption.

CVSS severity5.3
Medium
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authentication in SUMIT Payment Gateway for WooCommerce before 4.0.0 allows remote attackers to mark pending orders paid. The Bit IPN processing path trusts an inbound payment notification without confirming its authenticity with the payment provider before updating the linked WooCommerce order. No account is required; exploitation changes commerce state without completing payment, with no reported data disclosure or service interruption.

The record

CVE
CVE-2026-84091
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
Effy Teva
Product
SUMIT Payment Gateway for WooCommerce
Classifications
CWE-287, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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.

  1. Affected versionversion=0 <4.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Effy Teva · SUMIT Payment Gateway for WooCommerceversion=0 <4.0.0

Published CVSS scores

5.3WPScanCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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