CVE-2026-15052

highCVSS 7.2covered by 1 sourcefirst seen 2026-08-01

The MailChimp Subscribe Form, Optin Builder, PopUp Builder, Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Form Field Values in all versions up to, and including, 4.3.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

⚡ Watch CVE-2026-15052

Get an email if CVE-2026-15052 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.

Advisory coverage (1)

highCVE-2026-15052: The MailChimp Subscribe Form, Optin Builder, PopUp Builder, Form Builder plugin for WordPress …nvd · 2026-08-01

External references

NVD record for CVE-2026-15052

CVE.org record

Embed the live status

— this badge updates automatically when the KEV or exploit status changes. How to embed it →

[![CVE-2026-15052 status](https://www.csirts.com/badge/CVE-2026-15052)](https://www.csirts.com/cve/CVE-2026-15052)