Multiple SQL injection vulnerabilities in mes_add.php in x-script GuestBook 1.3a, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via the (1) name, (2) email, (3) icq, and (4) website parameters.

CS Guestbook stores sensitive information under the web root with insufficient access control, which allows remote attackers to obtain the admin name and MD5 password hash via a direct request for base/usr/0.php.

Multiple PHP remote file inclusion vulnerabilities in Guestbook Script 1.9 allow remote attackers to execute arbitrary PHP code via a URL in the script_root parameter to (1) delete.php, (2) edit.php, or (3) inc/common.inc.php; or (4) database.php, (5) entries.php, (6) index.php, (7) logout.php, or (8) settings.php in admin/. NOTE: a third party disputes this vulnerability, noting that these scripts defend against direct requests

SQL injection vulnerability in qtg_msg_view.php in QuickTalk guestbook 1.2 allows remote attackers to execute arbitrary SQL commands via the id parameter.

Directory traversal vulnerability in Advanced Guestbook 2.4.2 allows remote attackers to bypass .htaccess settings, and execute arbitrary PHP local files or read arbitrary local templates, via a .. (dot dot) in a lang cookie, followed by a filename without its .php extension, as demonstrated via a request to index.php.

Advanced Guestbook 2.4.2 allows remote attackers to obtain sensitive information via an invalid (1) GB_TBL parameter to (a) lang/codes-english.php or (b) image.php, which reveal the database name; (2) an invalid GB_DB parameter to index.php, coupled with a ../index lang cookie, which reveals the installation path; or (3) a direct request to index.php with no parameters or cookies, which reveals the installation path.

Cross-site scripting (XSS) vulnerability in picture.php in Advanced Guestbook 2.4.2 allows remote attackers to inject arbitrary web script or HTML via the picture parameter.

Cross-site scripting (XSS) vulnerability in Big Blue Guestbook allows remote attackers to inject arbitrary web script or HTML via the message field in the guestbook entry submission form.

FAC Guestbook 3.01 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/gbdb.mdb. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Direct static code injection vulnerability in index.php in Limesoft Guestbook (LS Simple Guestbook) 1.0 allows remote attackers to inject arbitrary PHP code into posts.txt via the message parameter.