vulnerability
WordPress Plugin: mailchimp-subscribe-sm: CVE-2023-33328: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:M/C:P/I:P/A:N) | May 22, 2023 | May 15, 2025 | Apr 30, 2026 |
Severity
4
CVSS
(AV:N/AC:M/Au:M/C:P/I:P/A:N)
Published
May 22, 2023
Added
May 15, 2025
Modified
Apr 30, 2026
Description
The MailChimp Subscribe Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in versions up to, and including, 4.0.9.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only impacts multi-site installations and installations where unfiltered_html has been disabled.
Solution
mailchimp-subscribe-sm-plugin-cve-2023-33328
References
Rapid7 Labs
2026 Global Threat Landscape Report
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