FortiWLM - Path Traversal (CVE-2023-34990)

CVE-2023-34990 is a relative path traversal vulnerability in Fortinet FortiWLM versions 8.6.0 through 8.6.5 and 8.5.0 through 8.5.4 which allows attackers to execute unauthorized code or commands by sending specially crafted web requests. This remote code execution flaw could be exploited to gain control over the affected system, potentially leading to data breaches or further network compromise.

CrowdSec has been tracking this vulnerability and its exploits since 17th of June 2025.

Based on data from the CrowdSec network, nearly all observed exploitation of CVE-2023-34990 is fully opportunistic, with attackers indiscriminately scanning the entire internet. These attacks are automated and lack any form of target selection or reconnaissance. In addition, according to the CrowdSec network, attack volume against CVE-2023-34990 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.

Attackers exploit the /ems/cgi-bin/ezrf_lighttpd.cgi endpoint by abusing the imagename parameter with directory traversal sequences to access sensitive files on FortiWLM systems.