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, prior to versions 1.9.4, 2.1.3, 2.3.2, and 3.4.0, the regexes used in the `scan` method and the findCharSet method can be bypassed by using UCS-4 and encoding guessing. 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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| PHPOffice | PhpSpreadsheet | < 1.29.4; >= 2.0.0, < 2.1.3; >= 2.2.0, < 2.3.2; >= 3.3.0, < 3.4.0 |
| phpoffice | phpspreadsheet | < 1.29.4; >= 2.0.0, < 2.1.3; >= 2.2.0, < 2.3.2; >= 3.3.0, < 3.4.0 |
References
- https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.phpProduct
- https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-jw4x-v69f-hh5wExploit, Vendor Advisory
- https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_ProcessingNot Applicable
- https://www.w3.org/TR/xml/#sec-guessing-no-ext-infoTechnical Description
Timeline
- Published
- Nov 18, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed