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    CVE-2024-45046

    PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In affected versions `\PhpOffice\PhpSpreadsheet\Writer\Html` doesn't sanitize spreadsheet styling information such as font names, allowing an attacker to inject arbitrary JavaScript on the page. As a result an attacker may used a crafted spreadsheet to fully takeover a session of a user viewing spreadsheet files as HTML. This issue has been addressed in release version 2.1.0. All users are advised to upgrade. There are no known workarounds for this vulnerability.

    Published:Aug 28, 2024
    Last Modified:Sep 4, 2024
    EPS:Aug 28, 2024
    EPSS Score:0.00112
    CVSS Score:5.4

    Affected Products

    Vendor
    Phpoffice
    Product
    Phpspreadsheet
    Vendor
    Phpspreadsheet Project
    Product
    Phpspreadsheet

    Exploits

    https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-wgmf-q9vr-vww6

    Related CVEs

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    CVE-2026-40863 (CVSS 7.5) — PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.4, 2.1.16, 2.4.5…
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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