CVE-2025-66128

WordPress Sendinblue for WooCommerce plugin <= 4.0.49 - Broken Access Control vulnerability

5.3 Medium

Missing Authorization vulnerability in Brevo Sendinblue for WooCommerce woocommerce-sendinblue-newsletter-subscription allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Sendinblue for WooCommerce: from n/a through <= 4.0.49.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.25%Up 0.2 points since Dec 16, 2025

What each source reports

CVE List Score used 5.3

WordPress Sendinblue for WooCommerce plugin <= 4.0.49 - Broken Access Control vulnerability

Record: CVE-2025-66128
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

EUVDEUVD-2025-203582 5.3

Record: EUVD-2025-203582
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-wqf3-6pf2-m6r6 5.3

Missing Authorization vulnerability in Brevo Sendinblue for WooCommerce woocommerce-sendinblue...

Record: GHSA-wqf3-6pf2-m6r6
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-862
Updated: 2026-11-02

NVD 5.3

Record: CVE-2025-66128
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

Affected products

brevo sendinblue for woocommerce

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-66128 is a medium vulnerability (CVSS 5.3) in Brevo Sendinblue For Woocommerce, published December 16, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 17th percentile. No source names a fixed version.