CVE-2024-48917 XXE in PHPSpreadsheet's XLSX reader
An attacker can bypass XML sanitization in PHPSpreadsheet to perform XML External Entity attacks, potentially reading sensitive files or executing code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-48917?
CVE-2024-48917 is a high-severity vulnerability in PHPOffice PhpSpreadsheet, published on 18 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. The `XmlScanner` class has a scan method which should prevent XXE attacks. However, in a bypass of the previously reported `CVE-2024-47873`, the regexes from the `findCharSet` method, which is used for determining the current encoding can be bypassed by using a payload in the encoding UTF-7, and adding at end of the file a comment with the value `encoding="UTF-8"` with `"`, which is matched by the first regex, so that `encoding='UTF-7'` with single quotes `'` in the XML header is not matched by the second regex. An attacker can bypass the sanitizer and achieve an XML external entity attack. Versions 1.9.4, 2.1.3, 2.3.2, and 3.4.0 fix the issue.
Weakness: CWE-611
Which versions are affected by CVE-2024-48917?
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 | 1.29.4 |
phpoffice/phpspreadsheet Packagist | All versions | 1.29.4 |
phpoffice/phpspreadsheet Packagist | From 2.0.0 | 2.1.3 |
phpoffice/phpspreadsheet Packagist | From 2.0.0 | 2.1.3 |
phpoffice/phpspreadsheet Packagist | From 2.2.0 | 2.3.2 |
phpoffice/phpspreadsheet Packagist | From 2.2.0 | 2.3.2 |
4 more packages
phpoffice/phpspreadsheet Packagist | From 3.3.0 | 3.4.0 |
phpoffice/phpspreadsheet Packagist | From 3.3.0 | 3.4.0 |
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-2024-48917?
Upgrade phpoffice/phpspreadsheet to a fixed version for your release line: 1.29.4, 2.1.3, 2.3.2 or 3.4.0.
Is CVE-2024-48917 being exploited?
There is no known exploitation of CVE-2024-48917 in the wild and no public exploit code.
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-7cc9-j4mv-vcjp.