The IndexedDB implementation in Google Chrome before 25.0.1364.152 allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16653
https://code.google.com/p/chromium/issues/detail?id=174895
http://googlechromereleases.blogspot.com/2013/03/stable-channel-update_4.html