Unus WP - Path Traversal (CVE-2015-9406)

CVE-2015-9406 is a directory traversal vulnerability in the mTheme-Unus WordPress theme prior to version 2.3, which allows attackers to read arbitrary files on the server by manipulating the files parameter in css/css.php. This flaw could be exploited to access sensitive information, potentially exposing configuration files or credentials to remote attackers.

CrowdSec has been tracking this vulnerability and its exploits since 21st of January 2026.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2015-9406 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-2015-9406 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 the files parameter in requests to /wp-content/themes/mTheme-Unus/css/css.php by injecting directory traversal sequences (e.g., ../../../../wp-config.php) to access sensitive files on the server.