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    CVE-2026-3253

    The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the forms() method of the AdminController class in all versions up to, and including, 1.7.21. This makes it possible for authenticated attackers, with Contributor-level access and above, to create or delete arbitrary signup forms.

    Published:Sep 24, 2026
    Last Modified:Sep 28, 2026
    EPS:Sep 24, 2026
    EPSS Score:0.00161
    CVSS Score:4.3

    Affected Products

    Vendor
    Mailerlite
    Product
    Mailerlite Signup Forms
    Vendor
    Wordpress-extensions
    Product
    Mailerlite-signup Forms

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-862 Missing Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High