CVE-2024-45292

Description

### Summary `\PhpOffice\PhpSpreadsheet\Writer\Html` does not sanitize "javascript:" URLs from hyperlink `href` attributes, resulting in a Cross-Site Scripting vulnerability. ### PoC Example target script: ``` <?php require 'vendor/autoload.php'; $reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader("Xlsx"); $spreadsheet = $reader->load(__DIR__ . '/book.xlsx'); $writer = new \PhpOffice\PhpSpreadsheet\Writer\Html($spreadsheet); print($writer->generateHTMLAll()); ``` Save this file in the same directory: [book.xlsx](https://github.com/PHPOffice/PhpSpreadsheet/files/15099763/book.xlsx) Open index.php in a web browser and click on both links. The first demonstrates the vulnerability in a regular hyperlink and the second in a HYPERLINK() formula.

How to fix CVE-2024-45292

To remediate CVE-2024-45292, upgrade the affected package to a fixed version below.

• —no fix listed
• —upgrade to 2.3.0 or later

Is CVE-2024-45292 being exploited?

Low — EPSS is 1.1%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, <= 1.8.2
• >= 2.2.0, < 2.3.0

CVSS scores

References (6)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2024-45292
• PATCHgithub.com/PHPOffice/PhpSpreadsheet
• WEBgithub.com/PHPOffice/PhpSpreadsheet/commit/392dd08c5569b623060784e1333454d64df1f03d
• WEBgithub.com/PHPOffice/PhpSpreadsheet/commit/8b9b378ecdc603234a34aab3b293d2cdc8e9210e