CVE-2024-45046
PhpSpreadsheet HTML writer is vulnerable to Cross-Site Scripting via style information
Impact
### Summary `\PhpOffice\PhpSpreadsheet\Writer\Html` doesn't sanitize spreadsheet styling information such as font names, allowing an attacker to inject arbitrary JavaScript on the page. ### 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/15212797/book.xlsx) Open index.php in a web browser. An alert should be displayed. ### Impact Full takeover of the session of users viewing spreadsheet files as HTML.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | phpoffice/phpspreadsheet | >= 2.0.0, < 2.1.0 | 2.1.0 |
| composer | phpoffice/phpexcel | <= 1.8.2 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Phpoffice | Phpspreadsheet | before 1.29.1 from 2.0.0 before 2.1.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/PHPOffice/PhpSpreadsheet/commit/f7cf378faed2e11cf4825bf8bafea4922ae44667
- https://github.com/PHPOffice/PhpSpreadsheet/pull/3957
- https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-wgmf-q9vr-vww6
- https://github.com/advisories/GHSA-wgmf-q9vr-vww6
- https://nvd.nist.gov/vuln/detail/CVE-2024-45046