Advisories for Composer/Sabre/Dav package

SabreDAV before 1.7.11, as used in ownCloud Server before 5.0.15 and 6.0.x before 6.0.2, allows remote attackers to read arbitrary files, cause a denial of service, or possibly have other impact via an XML External Entity (XXE) attack.

The HTMLBrowser plugin does not properly check path separators in the base path, which allows remote attackers to read arbitrary files via a backslash character.