EyesOfNetwork - Information Disclosure (CVE-2020-8657)

CVE-2020-8657 is a critical vulnerability in EyesOfNetwork 5.3 where a hardcoded API key is used across all installations, making it trivial for attackers to guess or calculate the admin access token. This flaw enables remote attackers to gain unauthorized administrative access, potentially leading to full system compromise.

CrowdSec has been tracking this vulnerability and its exploits since 15th of October 2025.

CrowdSec network observations suggest that most exploitation of CVE-2020-8657 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. CrowdSec network telemetry also shows that exploitation of CVE-2020-8657 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Attackers exploit the EyesOfNetwork API by sending POST requests to /eonapi/createEonUser with a hardcoded or predictable apiKey parameter, allowing unauthorized creation of administrative users.