{"id":"CVE-2026-118166","title":"MC4WP: Mailchimp for WordPress < 4.15.0 - Unauthenticated Arbitrary Shortcode Execution via Dynamic Content Tag","summary":"The MC4WP: Mailchimp for WordPress WordPress plugin before 4.15.0 does not prevent request-derived values in its dynamic content tags from being processed as shortcodes when a form is embedded with its block, allowing unauthenticated vis…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-74"],"product":"MC4WP: Mailchimp for WordPress","affected":["mc4wp_mailchimp_for_wordpress < 4.15.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T11:41:32.175152Z"},"published":"2026-11-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T11:50:26.524Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118166","references":[{"url":"https://wpscan.com/vulnerability/a8b2a564-25ae-4ed8-9c2c-989b104ba4c8/"}],"tags":["cve.org"],"ingestedAt":"2026-11-06T07:47:15.874Z","epss":0.00177,"epssPercentile":0.07336,"slug":"CVE-2026-118166","body":"## Overview\n\nThe MC4WP: Mailchimp for WordPress WordPress plugin before 4.15.0 does not prevent request-derived values in its dynamic content tags from being processed as shortcodes when a form is embedded with its block, allowing unauthenticated visitors to execute arbitrary registered shortcodes with attacker-chosen attributes. This requires the site owner to have added a request-derived tag to the form content and to embed the form with the block rather than the classic shortcode.\n\n## Affected\n\n- `mc4wp_mailchimp_for_wordpress < 4.15.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}