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CVE-2026-87917

MC4WP: Mailchimp for WordPress <= 4.14.0 - Reflected Cross-Site Scripting via 'data' Dynamic Content Tag

CVSS 3.1 6.1 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-87917

Published

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'data' Dynamic Content Tag in all versions up to, and including, 4.14.0 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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-87917

Published

MC4WP: Mailchimp for WordPress

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "dvankooten",
                    "product": "MC4WP: Mailchimp for WordPress",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThanOrEqual": "4.14.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON