CVE-2019-12331
HIGH8.8EPSS 0.12%XXE in PHPSpreadsheet due to incomplete fix for previous encoding issue
Published: 11/20/2019Modified: 3/6/2025
Also known as:GHSA-vvwv-h69m-wg6f
Description
PHPOffice PhpSpreadsheet before 1.8.0 has an XXE issue. The XmlScanner decodes the sheet1.xml from an .xlsx to utf-8 if something else than UTF-8 is declared in the header. This was a security measurement to prevent CVE-2018-19277 but the fix is not sufficient. By double-encoding the the xml payload to utf-7 it is possible to bypass the check for the string ?<!ENTITY? and thus allowing for an xml external entity processing (XXE) attack.
Affected packages (2)
- Packagist/phpoffice/phpexcelfrom 0, <= 1.8.2
- Packagist/phpoffice/phpspreadsheetfrom 0, < 1.8.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
References (8)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2019-12331
- PATCHhttps://github.com/PHPOffice/PhpSpreadsheet
- WEBhttps://github.com/FriendsOfPHP/security-advisories/blob/master/phpoffice/phpspreadsheet/CVE-2019-12331.yaml
- WEBhttps://github.com/PHPOffice/PhpSpreadsheet/blob/master/CHANGELOG.md#180---2019-07-01
- WEBhttps://github.com/PHPOffice/PhpSpreadsheet/commit/0e6238c69e863b58aeece61e48ea032696c6dccd
- WEBhttps://github.com/PHPOffice/PhpSpreadsheet/pull/1041
- WEBhttps://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.8.0
- WEBhttps://herolab.usd.de/security-advisories/usd-2019-0046