{"id":"CVE-2026-118166","aliases":["EUVD-2026-117972","GHSA-7vpp-4gxp-3rx5"],"status":"published","title":"MC4WP: Mailchimp for WordPress \u003c 4.15.0 - Unauthenticated Arbitrary Shortcode Execution via Dynamic Content Tag","description":"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 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.","severity":{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00177,"percentile":0.07319,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-74"],"published":"2026-11-06T07:30:55Z","modified":"2026-11-06T11:50:26Z","products":[{"vendor":"dvankooten","product":"mc4wp: mailchimp for wordpress"},{"vendor":"unknown","product":"mc4wp: mailchimp for wordpress"}],"references":[{"url":"https://wpscan.com/vulnerability/a8b2a564-25ae-4ed8-9c2c-989b104ba4c8/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118166"},{"url":"https://wpscan.com/vulnerability/a8b2a564-25ae-4ed8-9c2c-989b104ba4c8"},{"url":"https://github.com/advisories/GHSA-7vpp-4gxp-3rx5"}],"sources":{"cve":[{"id":"CVE-2026-118166","title":"MC4WP: Mailchimp for WordPress \u003c 4.15.0 - Unauthenticated Arbitrary Shortcode Execution via Dynamic Content Tag","description":"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 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.","status":"published","published":"2026-11-06T07:30:55.888Z","modified":"2026-11-06T11:50:26.524Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-74"],"updated_at":"2026-11-06T12:28:03.779112Z"}],"euvd":[{"id":"EUVD-2026-117972","description":"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 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.","status":"published","published":"2026-11-06T07:30:55Z","modified":"2026-11-06T11:50:26Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-06T13:04:55.758116Z"}],"ghsa":[{"id":"GHSA-7vpp-4gxp-3rx5","title":"The MC4WP: Mailchimp for WordPress WordPress plugin before 4.15.0 does not prevent request...","description":"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 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.","status":"published","published":"2026-11-06T09:31:30Z","modified":"2026-11-06T12:30:37Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-74"],"updated_at":"2026-11-06T13:00:04.317934Z"}],"nvd":[{"id":"CVE-2026-118166","description":"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 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.","status":"published","published":"2026-11-06T08:17:18.4Z","modified":"2026-11-06T20:09:13.78Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-74"],"updated_at":"2026-11-06T22:02:17.053381Z"}]}}