source: https://www.securityfocus.com/bid/42779/info

EncFS is prone to design errors in its cryptographic implementation.

Three flaws have been identified that contribute to a weakening of the protections provided under CBC/CFB cipher mode.

Attackers may leverage these weaknesses to attack encrypted files through watermarking or other techniques. Successful attacks may disclose sensitive information. 

https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/34537.tar.gz