Directory traversal vulnerability in languages_cgi.php in Simple PHP Blog 0.5.1 and earlier allows remote authenticated users to include and execute arbitrary local files via a .. (dot dot) in the blog_language1 parameter.

Directory traversal vulnerability in install05.php in Simple PHP Blog (SPB) 0.4.7.1 and earlier allows remote attackers to include and execute arbitrary local files via directory traversal sequences and a NUL (%00) character in the blog_language parameter, as demonstrated by injecting PHP sequences into an Apache access_log file, which is then included using install05.php.

Multiple cross-site scripting (XSS) vulnerabilities in Simple PHP Blog 0.4.5 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) entry, (2) blog_subject, and (3) blog_text parameters (involving the temp_subject variable) in (a) preview_cgi.php and (b) preview_static_cgi.php, or (4) scheme_name parameter and (5) bg_color parameters (involving the preset_name and result variables) in (c) colors.php.