{"id":"CVE-2026-7520","published":"2026-08-05T08:16:44.560","lastModified":"2026-08-05T14:17:15.103","description":"The MailChimp Forms by MailMunch plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `sign_in()` and `sign_up()` AJAX handlers in all versions up to, and including, 3.2.7. This makes it possible for authenticated attackers, with Subscriber-level access and above, to relink the site's MailMunch integration to an attacker-controlled MailMunch account by submitting attacker-supplied credentials. Once relinked, all subscriber data captured by the plugin's forms is delivered to the attacker, and the forms/landing pages rendered on the site are pulled from the attacker's MailMunch account.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-862"],"vendors":[],"products":[],"references":[{"url":"https://plugins.trac.wordpress.org/browser/mailchimp-forms-by-mailmunch/tags/3.2.7/admin/class-mailchimp-mailmunch-admin.php#L126","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/mailchimp-forms-by-mailmunch/tags/3.2.7/admin/class-mailchimp-mailmunch-admin.php#L134","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/mailchimp-forms-by-mailmunch/tags/3.2.7/includes/class-mailchimp-mailmunch.php#L219","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/mailchimp-forms-by-mailmunch/tags/3.2.7/includes/class-mailmunch-api.php#L354","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/mailchimp-forms-by-mailmunch/tags/3.2.7/includes/class-mailmunch-api.php#L371","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/mailchimp-forms-by-mailmunch/trunk/admin/class-mailchimp-mailmunch-admin.php#L134","tags":[]},{"url":"https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3593826%40mailchimp-forms-by-mailmunch%2Ftags%2F3.2.8&old=3445363%40mailchimp-forms-by-mailmunch%2Ftags%2F3.2.7","tags":[]},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/c9d00ee8-b9df-4044-a5e2-320391d6c9b1?source=cve","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"The flaw allows authenticated attackers with Subscriber-level access to modify data by relinking MailMunch integration, leading to unauthorized access to subscriber data.","exploitability":"Exploitation is moderate as it requires an attacker to have Subscriber-level access and submit attacker-supplied credentials via AJAX handlers.","blast_radius":"If exploited, the impact could be significant as it grants attackers access to all captured subscriber data and control over forms/landing pages on the site.","remediation":"Update to the latest version of the MailChimp Forms by MailMunch plugin or apply a capability check patch if available.","tags":["auth-bypass","data-exposure","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T06:50:28.316Z"}}