CVE-2026-15297: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in neeraj_slit Brevo – Email, SMS, Web Push, Chat, and more.
The Newsletter, SMTP, Email marketing and Subscribe forms by Brevo (formely Sendinblue) plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the page parameter in all versions up to, and including, 3.1.77 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.
AI Analysis
Technical Summary
CVE-2026-15297 is a reflected Cross-Site Scripting (CWE-79) vulnerability in the Brevo WordPress plugin (formerly Sendinblue) affecting all versions up to 3.1.77. The flaw exists due to inadequate sanitization and escaping of the 'page' parameter in the plugin's newsletter, SMTP, email marketing, and subscription forms. An attacker can exploit this by crafting a malicious link that, when clicked by a user, executes arbitrary JavaScript in the context of the affected site. This vulnerability does not require authentication and impacts confidentiality and integrity with no impact on availability.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary scripts in the context of the victim's browser, potentially leading to theft of sensitive information or session hijacking. The vulnerability impacts confidentiality and integrity but does not affect availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with links involving the 'page' parameter in affected versions. Monitoring vendor channels for updates and applying patches promptly once released is recommended.
CVE-2026-15297: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in neeraj_slit Brevo – Email, SMS, Web Push, Chat, and more.
Description
The Newsletter, SMTP, Email marketing and Subscribe forms by Brevo (formely Sendinblue) plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the page parameter in all versions up to, and including, 3.1.77 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.
CVSS v3.1
Score 6.1medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-15297 is a reflected Cross-Site Scripting (CWE-79) vulnerability in the Brevo WordPress plugin (formerly Sendinblue) affecting all versions up to 3.1.77. The flaw exists due to inadequate sanitization and escaping of the 'page' parameter in the plugin's newsletter, SMTP, email marketing, and subscription forms. An attacker can exploit this by crafting a malicious link that, when clicked by a user, executes arbitrary JavaScript in the context of the affected site. This vulnerability does not require authentication and impacts confidentiality and integrity with no impact on availability.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary scripts in the context of the victim's browser, potentially leading to theft of sensitive information or session hijacking. The vulnerability impacts confidentiality and integrity but does not affect availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with links involving the 'page' parameter in affected versions. Monitoring vendor channels for updates and applying patches promptly once released is recommended.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-09T15:53:39.402Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a50809468715ace430636d1
Added to database: 07/10/2026, 05:18:12 UTC
Last enriched: 07/17/2026, 09:52:12 UTC
Last updated: 08/22/2026, 10:52:07 UTC
Views: 68
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