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    CVE-2017-17671

    vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\ traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of ".." to reach an Apache HTTP Server log file.

    Published:Dec 14, 2017
    Last Modified:Apr 20, 2025
    EPS:Dec 14, 2017
    EPSS Score:0.01286
    CVSS Score:9.8

    Affected Products

    Vendor
    Microsoft
    Product
    Windows
    Vendor
    Vbulletin
    Product
    Vbulletin

    Exploits

    https://blogs.securiteam.com/index.php/archives/3569https://blogs.securiteam.com/index.php/archives/3569

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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