ShellCodeX vulnerability brief
HIGH
Received
CVE-2026-15052
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.
Published 01 Aug 2026, 09:16 UTC
Last modified 01 Aug 2026, 09:16 UTC
01
Attack profile
The conditions required to exploit this vulnerability and its potential impact.
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
02
Affected products
Product applicability statements supplied with the NVD record.
NVD has not published structured affected-product data for this record.
03
Weakness classification
CWE categories help security teams group the underlying software weakness.
04
Source references
External advisories, patches and technical reports attached to this CVE record.
NVD
National Vulnerability Database recordnvd.nist.gov
↗
01
Technical reference
security@wordfence.com
↗
02
Technical reference
security@wordfence.com
↗
03
Technical reference
security@wordfence.com
↗
04
Technical reference
security@wordfence.com
↗
05
Technical reference
security@wordfence.com
↗
06
Technical reference
security@wordfence.com
↗
07
Technical reference
security@wordfence.com
↗