FAC Guestbook 2.0 stores sensitive information under the web root with insufficient access control, which allows remote attackers to download a database via a direct request for db/Gdb.mdb.

Direct static code injection vulnerability in index.php in Limesoft Guestbook (LS Simple Guestbook) allows remote attackers to inject arbitrary PHP code into posts.txt via the name parameter. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Multiple directory traversal vulnerabilities in PcP-Guestbook (PcP-Book) 3.0 allow remote attackers to include and execute arbitrary local files via a .. (dot dot) in the lang parameter to (1) index.php, (2) gb.php, or (3) faq.php.

Multiple SQL injection vulnerabilities in realGuestbook 5.01 allow remote attackers to execute arbitrary SQL commands via the (1) name, (2) email, (3) homepage, and (4) text parameters to save_entry.php, as reachable through add_entry.php; and possibly other unspecified parameters and files. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Cross-site scripting (XSS) vulnerability in save_entry.php in realGuestbook 5.01 allows remote attackers to inject arbitrary web script or HTML via the homepage parameter, as reachable through add_entry.php. NOTE: the original report stated that the vulnerability was in add_entry.php, which does not receive the input data.

Multiple cross-site scripting (XSS) vulnerabilities in realGuestbook 5.01, when register_globals is enabled, allow remote attackers to inject arbitrary web script or HTML via the (1) bg_color_1, (2) fs_menu, (3) fc_menu, (4) ff_menu, (5) bg_color_2, (6) fs_normal, (7) fc_normal, and (8) ff_normal parameters to welcome_admin.php; and possibly unspecified other parameters and files. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Cross-site scripting (XSS) vulnerability in Guestbook.php in Creative Guestbook 1.0 allows remote attackers to inject arbitrary web script or HTML via an unspecified parameter.

Creative Guestbook 1.0 allows remote attackers to add an administrative account via a direct request to createadmin.php with Name, Email, and PASSWORD parameters set.

PHP remote file inclusion vulnerability in template.class.php in Carbonize Lazarus Guestbook before 1.7.3 allows remote attackers to execute arbitrary PHP code via a URL in the include_path parameter to admin.php, probably due to a dynamic variable evaluation vulnerability.

PHP remote file inclusion vulnerability in styles/internal/header.php in the PostGuestbook 0.6.1 module for PHP-Nuke allows remote attackers to execute arbitrary PHP code via a URL in the tpl_pgb_moddir parameter.