This question is related to "Is it safe to initialize a random number generator with MD5?".
But in the context of steganography we don't know which pixels have been selected to hide information. In addition, the content could be encrypted, so we do not know if the hidden information that we extract (with a guessed password) is the message or noise.
In this scenario, is it safe to initialize a PRNG with the MD5 hash of a password? and what interests me the most: if it is not, how can it be exploited?