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    2 vulnerabilities found for Mailmunch Forms for Mailchimp by mailmunch

    CVE-2026-7520 (GCVE-0-2026-7520)

    Vulnerability from nvd – Published: 2026-08-05 07:39 – Updated: 2026-08-05 13:11
    VLAI
    Title
    MailChimp Forms by MailMunch <= 3.2.7 - Missing Authorization to Authenticated (Subscriber+) MailMunch Integration Takeover via 'sign_in' AJAX Action
    Summary
    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.
    Severity
    8.1 (High)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-05 13:11 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    mailmunch Mailmunch Forms for Mailchimp Affected: 0 , ≤ 3.2.7 (semver)
    		Create a notification for this product.
    Credits
    t0ann9uy3n
    Show details on NVD website
    To clipboard 

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    CVE-2026-7520 (GCVE-0-2026-7520)

    Vulnerability from cvelistv5 – Published: 2026-08-05 07:39 – Updated: 2026-08-05 13:11
    VLAI
    Title
    MailChimp Forms by MailMunch <= 3.2.7 - Missing Authorization to Authenticated (Subscriber+) MailMunch Integration Takeover via 'sign_in' AJAX Action
    Summary
    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.
    Severity
    8.1 (High)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-05 13:11 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    mailmunch Mailmunch Forms for Mailchimp Affected: 0 , ≤ 3.2.7 (semver)
    		Create a notification for this product.
    Credits
    t0ann9uy3n
    Show details on NVD website
    To clipboard 

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