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CVE-2019-12331
Published: Nov 7, 2019
Modified: Aug 4, 2024
PUBLISHED
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.
| Vendor | Product | Versions |
|---|---|---|
n/a | n/a | affected n/a |
References
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