{"id":"GHSA-vvwv-h69m-wg6f","aliases":["CVE-2019-12331"],"title":"XXE in PHPSpreadsheet due to incomplete fix for previous encoding issue","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attack.","severity":"high","score":8.8,"published":"2019-11-20T01:39:57.000Z","modified":"2025-03-06T18:09:31.120Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"phpoffice/phpspreadsheet","ranges":[{"events":[{"introduced":"0"},{"fixed":"1.8.0"}],"type":"ECOSYSTEM"}],"versions":["1.0.0","1.0.0-beta","1.0.0-beta2","1.1.0","1.2.0","1.2.1","1.3.0","1.3.1","1.4.0","1.4.1","1.5.0","1.5.1","1.5.2","1.6.0","1.7.0"],"fixed":["1.8.0"]},{"ecosystem":"Packagist","name":"phpoffice/phpexcel","ranges":[{"events":[{"introduced":"0"},{"last_affected":"1.8.2"}],"type":"ECOSYSTEM"}],"versions":["1.7.9","1.7.9-rc1","1.8.0","1.8.0rc1","1.8.0rc2","1.8.0rc3","1.8.0rc4","1.8.1","1.8.2"],"fixed":[]}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2019-12331","https://github.com/PHPOffice/PhpSpreadsheet/pull/1041","https://github.com/PHPOffice/PhpSpreadsheet/commit/0e6238c69e863b58aeece61e48ea032696c6dccd","https://github.com/FriendsOfPHP/security-advisories/blob/master/phpoffice/phpspreadsheet/CVE-2019-12331.yaml","https://github.com/PHPOffice/PhpSpreadsheet","https://github.com/PHPOffice/PhpSpreadsheet/blob/master/CHANGELOG.md#180---2019-07-01","https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.8.0","https://herolab.usd.de/security-advisories/usd-2019-0046"],"sources":[{"name":"OSV","id":"GHSA-vvwv-h69m-wg6f","modified":"2025-03-06T18:09:31.120262Z","url":"https://osv.dev/vulnerability/GHSA-vvwv-h69m-wg6f"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8}]}