PIVX through 3.1.03 (a chain-based proof-of-stake cryptocurrency) allows a remote denial of service, exploitable by an attacker who acquires even a small amount of stake/coins in the system. The attacker sends invalid headers/blocks, which are stored on the victim's disk.

An issue was discovered in Decentralized Anonymous Payment System (DAPS) through 2019-08-26. It is possible to force wallets to send HTTP requests to arbitrary locations, both on the local network and on the internet. This is a serious threat to user privacy, since it can possibly leak their IP address and the fact that they are using the product. This also affects Dash Core through 0.14.0.3 and Private Instant Verified Transactions (PIVX) through 3.4.0.

An issue was discovered in Decentralized Anonymous Payment System (DAPS) through 2019-08-26. The content to be signed is composed of a representation of strings, rather than being composed of their binary representations. This is a weak signature scheme design that would allow the reuse of signatures in some cases (or even the reuse of signatures, intended for one type of message, for another type). This also affects Private Instant Verified Transactions (PIVX) through 3.4.0.