How severe is CVE-2024-8477?

CVE-2024-8477 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2024-8477 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-8477?

CVE-2024-8477 affects Brevo Newsletter, Smtp, Email Marketing And Subscribe. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-8477?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-8477 have an EU (EUVD) identifier?

Yes. CVE-2024-8477 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-49208.

When was CVE-2024-8477 published?

CVE-2024-8477 was published on 2024-10-10 and last updated on 2026-06-17.

CVE-2024-8477

CVE-2024-8477 is a medium-severity vulnerability in Brevo Newsletter, Smtp, Email Marketing And Subscribe with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-49208
Weakness: CWE-352
Affected product: Brevo Newsletter, Smtp, Email Marketing And Subscribe
Published: 2024-10-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-8477?: 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.
How severe is CVE-2024-8477?: CVE-2024-8477 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2024-8477 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-8477?: CVE-2024-8477 affects Brevo Newsletter, Smtp, Email Marketing And Subscribe. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-8477?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-8477 have an EU (EUVD) identifier?: Yes. CVE-2024-8477 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-49208.
When was CVE-2024-8477 published?: CVE-2024-8477 was published on 2024-10-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:brevo:newsletter\,_smtp\,_email_marketing_and_subscribe:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Brevo Newsletter, Smtp, Email Marketing And Subscribe

CVE-2024-35668 — High (CVSS 7.1): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Brevo…
CVE-2023-2472 — Medium (CVSS 6.1): The Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue WordPress plugin before 3.1.61 does not…
CVE-2021-24874 — Medium (CVSS 6.1): The Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue WordPress plugin before 3.1.31 does not escape…
CVE-2021-24923 — Medium (CVSS 6.1): The Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue WordPress plugin before 3.1.25 does not escape…

All CVEs affecting Brevo Newsletter, Smtp, Email Marketing And Subscribe →

Other CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities

CVE-2025-32642 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in appsbd Vite Coupon vite-coupon allows Remote Code Inclusion.This…
CVE-2025-23922 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in Harsh iSpring Embedder embed-ispring allows Upload a Web Shell to a…
CVE-2017-5145 — Critical (CVSS 10.0): An issue was discovered in Carlo Gavazzi VMU-C EM prior to firmware Version A11_U05, and VMU-C PV prior to firmware…
CVE-2019-25729 — Critical (CVSS 9.8): PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute…
CVE-2025-48340 — Critical (CVSS 9.8): Cross-Site Request Forgery (CSRF) vulnerability in Danny Vink User Profile Meta Manager user-profile-meta allows…
CVE-2025-2907 — Critical (CVSS 9.8): The Order Delivery Date WordPress plugin before 12.3.1 does not have authorization and CSRF checks when importing…

Browse all CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities →