Cross-site Scripting (XSS) Affecting phpoffice/phpexcel package, versions >=0.0.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-PHPOFFICEPHPEXCEL-9299753
- published7 Mar 2025
- disclosed3 Jan 2025
- creditAleksey Solovev
Introduced: 3 Jan 2025
CVE-2024-56411 (opens in a new tab)How to fix?
There is no fixed version for phpoffice/phpexcel.
Overview
Affected versions of this package are vulnerable to Cross-site Scripting (XSS) due to improper sanitization of the generateHTMLHeader parameter of the PhpOffice\PhpSpreadsheet\Writer\Html class.
PoC
<?php
require __DIR__ . '/vendor/autoload.php';
$inputFileName = './doc/Book1.xlsx';
$spreadsheet = \PhpOffice\PhpSpreadsheet\IOFactory::load($inputFileName);
$writer = new \PhpOffice\PhpSpreadsheet\Writer\Html($spreadsheet);
print($writer->generateHTMLAll());