So, this article talks about a new tool called RedisRaider. Basically, it exploits Redis servers that are accidentally left open to the internet – a pretty common mistake.
It lets attackers steal data, potentially causing a lot of damage. 
The tool is open source, which is good for security research, but also means it could be misused. The HackerOne discussion mentions it's relatively easy to use, highlighting the seriousness of properly securing your Redis instances. It's a reminder to double-c