Firefox before 1.0.5 allows remote attackers to steal sensitive information by opening a malicious link in the Firefox sidebar using the _search target, then injecting script into other pages via a data: URL.
Exploitability
AV:NAC:LAu:NImpact
C:PI:PA:P7.5/AV:N/AC:L/Au:N/C:P/I:P/A:P