2014-05-07, 11:16 PM
Doesn't necessarily mean vulnerable. Usually a directory index is just an Apache misconfiguration or a missing index file (while apache indexing is enabled, which should in most cases be disabled).
PGP Key (Fingerprint: 23B6 F4C0 FE2D 45AA 61A0 1E86 DB87 09DC DD87 6E40)