CVE-2026-28180Network attack vector

Payment-status disclosure via missing order-key validation

Published Aug 6, 2026 · Updated Aug 6, 2026

IDOR in Mercado Pago payments for WooCommerce 8.9.0 and earlier allows remote attackers to read another buyer's Pix payment status. The Pix payment-status polling handler relies on a nonce without also validating the WooCommerce order key that binds the request to its owner. The endpoint is network-reachable without authentication, and a successful request discloses only another buyer's payment status.

CVSS severity5.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in Mercado Pago payments for WooCommerce 8.9.0 and earlier allows remote attackers to read another buyer's Pix payment status. The Pix payment-status polling handler relies on a nonce without also validating the WooCommerce order key that binds the request to its owner. The endpoint is network-reachable without authentication, and a successful request discloses only another buyer's payment status.

The record

CVE
CVE-2026-28180
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Mercado Pago
Product
Mercado Pago payments for WooCommerce
Classifications
CWE-639, CAPEC-180, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=n/a <=8.9.0 changes=[{"at":"8.9.1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mercado Pago · Mercado Pago payments for WooCommerceversion=n/a <=8.9.0 changes=[{"at":"8.9.1","status":"unaffected"}]

Published CVSS scores

5.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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