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    CVE-2026-117554

    Admidio before 5.0.17 contains an improper access control vulnerability that allows authenticated members to register event guests by submitting the additional_guests field when guests are disallowed. Attackers can set additional_guests to the remaining seat count in modules/events/events_function.php to exhaust event capacity and block other members from registering.

    Published:Oct 27, 2026
    Last Modified:Nov 2, 2026
    EPS:Oct 27, 2026
    EPSS Score:0.00289
    CVSS Score:4.3

    Affected Products

    Vendor
    Admidio
    Product
    Admidio

    Exploits

    No exploit reference

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    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