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TI-2021-07156 Aliases CVE-2021-24874GHSA-2hcr-94vw-mxjh

Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue < 3.1.31 - Reflected Cross-Site Scripting

Priority LOW 29CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

The Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue WordPress plugin before 3.1.31 does not escape the lang and pid parameter before outputting them back in attributes, leading to Reflected Cross-Site Scripting issues

Why it matters now

EPSS 0.008 56th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue (Unknown): 3.1.31

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownNewsletter, SMTP, Email marketing and Subscribe forms by Sendinblue3.1.31 to before 3.1.313.1.31Patch availableCNA
  • Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue VendorUnknown Affected 3.1.31 to before 3.1.31 Fixed in 3.1.31 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:brevo:newsletter\,_smtp\,_email_marketing_and_subscribe:*:*:*:*:*:wordpress:*:*before 3.1.31VulnerableBrevo
  • cpe:2.3:a:brevo:newsletter\,_smtp\,_email_marketing_and_subscribe:*:*:*:*:*:wordpress:*:* Versions before 3.1.31 Vulnerable ·Brevo

Remediation

  • Fix · CNA Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue (Unknown) Fixed in 3.1.31

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-24874
  2. 2026-10-03 Alias added: GHSA-2hcr-94vw-mxjh

References

Exploit 1

  • TI-2023-02321 Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue < 3.1.61 - Reflected XSS CVSS 3.1MEDIUM 6.1
  • TI-2024-23537 Cross-site scripting in Brevo Newsletter, SMTP, Email marketing and Subscribe forms by… CVSS 3.1HIGH 7.1
  • TI-2021-07203 Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue < 3.1.25 - Reflected XSS CVSS 3.1MEDIUM 6.1
  • TI-2024-07859 Cross-site request forgery in neeraj_slit Brevo – Email, SMS, Web Push, Chat, and more. CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences