Directory traversal vulnerability in footer.php in David Bennett PHP-Post (PHPp) 1.0 and earlier allows remote attackers to read and include arbitrary local files via a .. (dot dot) sequence in the template parameter. NOTE: this was later reported to affect 1.0.1, and demonstrated for code execution by uploading and accessing an avatar file.

Variable overwrite vulnerability in David Bennett PHP-Post (PHPp) 1.0 and earlier allows remote attackers to overwrite arbitrary program variables via multiple vectors that use the extract function, as demonstrated by the table_prefix parameter in (1) index.php, (2) profile.php, and (3) header.php.

Multiple cross-site scripting (XSS) vulnerabilities in David Bennett PHP-Post (PHPp) 1.0 and earlier allow remote attackers to inject arbitrary web script or HTML via (1) the replyuser parameter in (a) pm.php; (2) the txt_jumpto parameter in (b) dropdown.php; the (3) txt_error and (4) txt_templatenotexist parameters in (c) template.php; the (5) split parameter in certain files, as demonstrated by (d) editprofile.php, (e) search.php, (f) index.php, and (g) pm.php; and the (6) txt_login parameter in (h) loginline.php; and allow remote authenticated users to inject arbitrary web script or HTML via the (7) txt_logout parameter in (i) loginline.php.

SQL injection vulnerability in profile.php in David Bennett PHP-Post (PHPp) 1.0 and earlier allows remote attackers to execute arbitrary SQL commands via the user parameter.

David Bennett PHP-Post (PHPp) 1.0 and earlier allows remote attackers to obtain sensitive information via a direct request for (1) footer.php, (2) template.php, or (3) lastvisit.php, which reveals the installation path in various error messages.