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cvelistMitreCVELIST:CVE-2019-12331
HistoryNov 07, 2019 - 2:03 p.m.

CVE-2019-12331

2019-11-0714:03:43
mitre
www.cve.org
1

AI Score

8.6

Confidence

High

EPSS

0.02

Percentile

88.8%

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 β€š<!ENTITYβ€˜ and thus allowing for an xml external entity processing (XXE) attack.

AI Score

8.6

Confidence

High

EPSS

0.02

Percentile

88.8%