(Community Edition). Because Magento 1.x reached its end-of-life (EOL) in June 2020, these exploits are widely documented and actively targeted by automated bots.
If you're looking for more information on this vulnerability, I recommend checking out: magento 1900 exploit github link
The small green light on his laptop flickered on. In the reflection of his monitor, Elias saw the heavy door of the server room creak open. It wasn't the police. It was a man in a gray suit holding a phone that displayed the exact same GitHub link. (Community Edition)