Openpyxl 2.4.1 resolves external entities by default, which allows remote attackers to conduct XXE attacks via a crafted .xlsx document.
References
- https://nvd.nist.gov/vuln/detail/CVE-2017-5992
- https://bitbucket.org/openpyxl/openpyxl/commits/3b4905f428e1
- https://bitbucket.org/openpyxl/openpyxl/issues/749
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854442
- http://www.openwall.com/lists/oss-security/2017/02/07/5
- https://github.com/advisories/GHSA-chqf-hx79-gxc6