FreePBX - SQLi (CVE-2025-57819)

CVE-2025-57819 is a critical vulnerability in FreePBX versions 15, 16, and 17 that allows unauthenticated attackers to access the FreePBX Administrator interface due to improper sanitization of user input. Exploiting this flaw can lead to arbitrary database manipulation and remote code execution, making it possible for attackers to fully compromise affected systems.

CrowdSec has been tracking this vulnerability and its exploits since 19th of September 2025.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2025-57819 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. CrowdSec data also reveals a clear uptick in attacks involving CVE-2025-57819 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Attackers exploit FreePBX by sending crafted requests to /admin/ajax.php with malicious SQL code in the brand parameter, enabling unauthenticated remote code execution and manipulation of backend cron jobs. Subsequent requests may target dynamically created PHP files in the web root to execute arbitrary commands.