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Mercado Pago payments for WooCommerce <= 8.9.0 — Unauthenticated Insecure Direct Object Reference

CVE-2026-28180Published · Updated

Action summary

Affected: ≤8.9.0Update to 8.9.1 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-639 Authorization Bypass Through User-Controlled Key
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Mercado Pago payments for WooCommerce woocommerce-mercadopago

  1. Affected≤ 8.9.0
  2. Patched in8.9.1

Update to 8.9.1 or newer.

You are affected if you run ≤ 8.9.0. Version 8.9.1 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Mercado Pago payments for WooCommerce.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 8.9.1, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Mercado Pago payments for WooCommerce to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Ananda Dhakal.

The Mercado Pago payments for WooCommerce plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 8.9.0 due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to perform an unauthorized action.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Mercado Pago payments for WooCommerce

All 5
More vulnerabilities in Mercado Pago payments for WooCommerce
SeverityVulnerabilityCVEPublished
Medium5.3Missing Authorization to Unauthenticated PIX Payment QR Code Image Disclosure
≤8.7.11Update to 8.7.12
CVE-2026-3208
Medium6.57.6.1 - Authenticated (Subscriber+) Arbitrary File Download
7.3.0 – 7.6.1Update to 7.6.2
CVE-2024-3934
Medium4.3Cross-Site Request Forgery
≤6.3.1Update to 6.4.0
CVE-2022-45068
Medium4.3Cross-Site Request Forgery
≤6.6.0Update to 6.7.0
—

Timeline

  1. CVE published

    Severity medium, CVSS 5.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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