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    CVE-2026-77138

    The extension fails to safely process untrusted client input of an attacker-controlled cookie directly to PHP's unserialize(). A remote, unauthenticated attacker can supply a crafted serialized payload to trigger PHP Object Injection, leading to Remote Code Execution on the TYPO3 server.

    Published:Aug 25, 2026
    Last Modified:Aug 28, 2026
    EPS:Aug 25, 2026
    EPSS Score:0.00423
    CVSS Score:9.3

    Affected Products

    Vendor
    Typo3
    Product
    Extension "html5 Video Player Vs. Powermail"

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-586 Object Injection

    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