Brevo — Email, SMS, Web Push, Chat, and more. <= 3.3.0 - Unauthenticated Authorization Bypass via Type Juggling
CVE-2025-14799Published · Updated Action summary
Affected: ≤3.3.0Update to 3.3.1 or newer
All remediation steps- Severity
- Medium6.5
- CVSS
- 6.5CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:LWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:LAvailability- Low
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Brevo – Email, SMS, Web Push, Chat, and more. mailin
- Affected≤ 3.3.0
- Patched in3.3.1
Update to 3.3.1 or newer.
You are affected if you run ≤ 3.3.0. Version 3.3.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Brevo – Email, SMS, Web Push, Chat, and more..
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 3.3.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Brevo – Email, SMS, Web Push, Chat, and more. to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to ISMAILSHADOW.
The Brevo - Email, SMS, Web Push, Chat, and more. plugin for WordPress is vulnerable to authorization bypass due to type juggling in all versions up to, and including, 3.3.0. This is due to the use of loose comparison (==) instead of strict comparison (===) when validating the installation ID in the `/wp-json/mailin/v1/mailin_disconnect` REST API endpoint. This makes it possible for unauthenticated attackers to disconnect the Brevo integration, delete the API key, remove all subscription forms, and reset plugin settings by sending a boolean `true` value for the `id` parameter, which bypasses the authorization check through PHP type juggling.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Brevo – Email, SMS, Web Push, Chat, and more.
All 9| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Cross-Site Request Forgery ≤3.1.87Update to 3.1.88 | CVE-2024-8477 | |
| Medium4.3 | Cross-Site Request Forgery ≤3.1.82Update to 3.1.83 | CVE-2024-43287 | |
| Medium6.1 | Reflected Cross-Site Scripting ≤3.1.77Update to 3.1.78 | CVE-2024-35668 | |
| Medium6.1 | Reflected Cross-Site Scripting ≤3.1.77Update to 3.1.78 | CVE-2026-15297 | |
| Medium6.1 | Reflected Cross-Site Scripting via 'lang' ≤3.1.60Update to 3.1.61 | CVE-2023-2472 |
- Medium4.3Cross-Site Request Forgery
≤3.1.87Update to 3.1.88
- Medium4.3Cross-Site Request Forgery
≤3.1.82Update to 3.1.83
- Medium6.1Reflected Cross-Site Scripting
≤3.1.77Update to 3.1.78
- Medium6.1Reflected Cross-Site Scripting
≤3.1.77Update to 3.1.78
- Medium6.1Reflected Cross-Site Scripting via 'lang'
≤3.1.60Update to 3.1.61
Timeline
CVE published
Severity medium, CVSS 6.5
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.