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Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')


Severity Medium
Score 5/10


Multiple directory traversal vulnerabilities in index.php in Flat PHP Board 1.2 and earlier allow remote attackers to (1) create arbitrary files via a .. (dot dot) in the username parameter when registering a user account, and (2) read arbitrary PHP files via a .. (dot dot) in (a) the topic parameter in a topic action or (b) the username parameter in a viewprofile action.

  • LOW
  • NONE
  • NONE
  • NONE

CWE-22 - Path Traversal

Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.


Advisory Timeline

  • Published