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    CVE-2026-11855

    The Simple Membership WordPress plugin before 4.7.5 does not verify the authenticity of Stripe webhook requests when no signing secret is configured, nor escape a value taken from them before outputting it in an administrator notice, allowing unauthenticated attackers to inject arbitrary web scripts that execute in the context of a logged-in administrator.

    Published:Jul 6, 2026
    Last Modified:Nov 10, 2026
    EPS:Jul 6, 2026
    EPSS Score:0.00505
    CVSS Score:8.8

    Affected Products

    Vendor
    Wordpress-extensions
    Product
    Simple Membership

    Exploits

    No exploit reference

    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