What’s Vulnerable › Vulnerabilities

CVE-2024-8477: Newsletter, SMTP, Email marketing and Subscribe forms by Brevo (formely Sendinblue) <= 3.1.87 - Cross-Site Request Forgery

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-10 · updated 2026-06-17
• Weakness: CWE-352

Description

The Newsletter, SMTP, Email marketing and Subscribe forms by Brevo (formely Sendinblue) plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.1.87. This is due to missing or incorrect nonce validation on the Init() function. This makes it possible for unauthenticated attackers to log out of a Brevo connection via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

• neeraj_slit Brevo – Email, SMS, Web Push, Chat, and more.: before 3.1.88 — fixed in 3.1.88

How to fix

Upgrade to a fixed version: neeraj_slit Brevo – Email, SMS, Web Push, Chat, and more. 3.1.88. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/changeset/3165451/mailin/tags/3.1.88/page/page-home.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/e070b422-9036-4362-832b-43fd4838f394?source=cve

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