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    CVE-2026-93872

    Cotonti 1.0.0 passes the base64-decoded cb parameter to unserialize() without allowed_classes restriction in the comments plugin EditAction. Registered users with comment write permissions can instantiate arbitrary PHP objects and potentially achieve file write or code execution through gadget chains.

    Published:Sep 18, 2026
    Last Modified:Sep 21, 2026
    EPS:Sep 18, 2026
    EPSS Score:0.00439
    CVSS Score:7.5

    Affected Products

    Vendor
    Cotonti
    Product
    Cotonti
    Vendor
    Cotonti
    Product
    Cotonti Siena
    Vendor
    Cotonti
    Product
    Siena

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-586 Object Injection

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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