What’s Vulnerable › Vulnerabilities

CVE-2023-33328: WordPress MailChimp Subscribe Forms Plugin <= 4.0.9.1 is vulnerable to Cross Site Scripting (XSS)

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-28 · updated 2026-06-17
• Weakness: CWE-79

Description

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in PluginOps MailChimp Subscribe Form plugin <= 4.0.9.1 versions.

Affected products

• PluginOps MailChimp Subscribe Form: before 4.0.9.2 — fixed in 4.0.9.2

How to fix

Upgrade to a fixed version: PluginOps MailChimp Subscribe Form 4.0.9.2. Check the vendor advisory for mitigations.

References

• https://patchstack.com/database/vulnerability/mailchimp-subscribe-sm/wordpress-pluginops-optin-builder-plugin-4-0-9-1-cross-site-scripting-xss?_s_id=cve
• https://patchstack.com/database/vulnerability/mailchimp-subscribe-sm/wordpress-pluginops-optin-builder-plugin-4-0-9-1-cross-site-scripting-xss?_s_id=cve

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