Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue <= 3.1.60 - Reflected Cross-Site Scripting via 'lang'

6.1
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2023-2472
CVSS 6.1 (Medium)
Publicly Published May 10, 2023
Last Updated May 19, 2023
Researcher Erwan LR - WPScan

Description

The Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'lang' parameter in versions up to, and including, 3.1.60 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

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Vulnerability Details for Brevo – Email, SMS, Web Push, Chat, and more.

Software Type Plugin
Software Slug mailin (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.1.61, or a newer patched version
Affected Version
  • <= 3.1.60
Patched Version
  • 3.1.61

Recent vulnerabilities in Brevo – Email, SMS, Web Push, Chat, and more.

# Title CVE ID CVSS Researchers Date
1 Brevo - Email, SMS, Web Push, Chat, and more. <= 3.3.0 - Unauthenticated Authorization Bypass via Type Juggling CVE-2025-14799 6.5 ISMAILSHADOW February 17, 2026
2 Newsletter, SMTP, Email marketing and Subscribe forms by Brevo (formely Sendinblue) <= 3.1.87 - Cross-Site Request Forgery CVE-2024-8477 4.3 Joshua Chan October 9, 2024
3 Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue <= 3.1.82 - Cross-Site Request Forgery CVE-2024-43287 4.3 Rafie Muhammad August 16, 2024
4 Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue <= 3.1.77 - Reflected Cross-Site Scripting CVE-2024-35668 6.1 Rafie Muhammad June 3, 2024
5 Newsletter, SMTP, Email marketing and Subscribe forms by Brevo (formely Sendinblue) <= 3.1.77 - Reflected Cross-Site Scripting CVE-2026-15297 6.1 stealthcopter March 22, 2024
6 Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue <= 3.1.39 - Cross-Site Scripting 7.2 Unknown April 8, 2022
7 Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue <= 3.1.30 - Reflected Cross-Site Scripting via lang & pid Parameters CVE-2021-24874 6.1 ZhongFu Su January 12, 2022
8 Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue <= 3.1.24 - Reflected Cross-Site Scripting CVE-2021-24923 6.1 ZhongFu Su December 23, 2021

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