CVE-2024-56366 PhpSpreadsheet vulnerable to unauthorized reflected XSS in the Accounting.php file
Attackers can execute arbitrary scripts in user browsers via reflected XSS in the Accounting sample script of the PhpSpreadsheet library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-56366?
CVE-2024-56366 is a high-severity cross-site scripting vulnerability in PHPOffice PhpSpreadsheet, published on 3 Jan 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Versions prior to 3.7.0, 2.3.5, 2.1.6, and 1.29.7 are vulnerable to unauthorized reflected cross-site scripting in the `Accounting.php` file. Using the `/vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Accounting.php` script, an attacker can perform a cross-site scripting attack. Versions 3.7.0, 2.3.5, 2.1.6, and 1.29.7 contain a patch for the issue.
Weakness: CWE-79
Which versions are affected by CVE-2024-56366?
10 open source packages ship an affected version, including phpoffice/phpspreadsheet and phpoffice/phpexcel. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
phpoffice/phpspreadsheet Packagist | All versions | 1.29.7 |
phpoffice/phpspreadsheet Packagist | All versions | 1.29.7 |
phpoffice/phpspreadsheet Packagist | From 2.0.0 | 2.1.6 |
phpoffice/phpspreadsheet Packagist | From 2.0.0 | 2.1.6 |
phpoffice/phpspreadsheet Packagist | From 2.2.0 | 2.3.5 |
phpoffice/phpspreadsheet Packagist | From 2.2.0 | 2.3.5 |
4 more packages
phpoffice/phpspreadsheet Packagist | From 3.0.0 | 3.7.0 |
phpoffice/phpspreadsheet Packagist | From 3.0.0 | 3.7.0 |
phpoffice/phpexcel Packagist | All versions to 1.8.2 | None |
phpoffice/phpexcel Packagist | All versions to 1.8.2 | None |
Products include Phpoffice Phpspreadsheet.
How do I fix CVE-2024-56366?
Upgrade phpoffice/phpspreadsheet to a fixed version for your release line: 1.29.7, 2.1.6, 2.3.5 or 3.7.0.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-56366 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-56366 exists.
Other vulnerabilities in PHPOffice PhpSpreadsheet
- CVE-2026-34084 PhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFactory::load
- CVE-2024-45048 XML External Entity Reference (XXE) in PHPSpreadsheet
- CVE-2019-12331 XXE in PHPSpreadsheet due to incomplete fix for previous encoding issue
- CVE-2018-19277 XXE in PHPSpreadsheet due to encoding issue
- CVE-2024-56365 PhpSpreadsheet vulnerable to unauthorized reflected XSS in the constructor of the Downloader class
Sources
Also known as GHSA-c6fv-7vh8-2rhr.