Tileserver - Path Traversal (CVE-2025-44137)

CVE-2025-44137 is a directory traversal vulnerability in MapTiler Tileserver-php v2.0, where improper handling of file paths in the renderTile function allows attackers to use specially crafted GET parameters to access arbitrary files on the server. This flaw could be exploited remotely to read sensitive files, potentially exposing confidential information or system credentials.

CrowdSec has been tracking this vulnerability and its exploits since 26th of November 2025.

Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2025-44137 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2025-44137 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2025-44137 is currently experiencing high visibility and active exploitation across the internet.

Attackers exploit this vulnerability by sending crafted requests to /tileserver.php with a Format parameter containing directory traversal sequences (e.g., /../../../../etc/passwd) to read arbitrary files from the server.