XSS exists in admin/gb-dashboard-widget.php in the Gwolle Guestbook (gwolle-gb) plugin before 2.5.4 for WordPress via the PATH_INFO to wp-admin/index.php

PHP remote file inclusion vulnerability in the Gwolle Guestbook plugin before 1.5.4 for WordPress, when allow_url_include is enabled, allows remote authenticated users to execute arbitrary PHP code via a URL in the abspath parameter to frontend/captcha/ajaxresponse.php. NOTE: this can also be leveraged to include and execute arbitrary local files via directory traversal sequences regardless of whether allow_url_include is enabled.

Cross-site scripting (XSS) vulnerability in Mrs. Shiromuku Perl CGI shiromuku(u1)GUESTBOOK 1.62 and earlier allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Mavili Guestbook, as released in November 2007, allows remote attackers to edit, delete, and approve arbitrary messages via a direct request to (1) edit.asp, (2) delete.asp, or (3) approve.asp.

Mavili Guestbook, as released in November 2007, stores guestbook.mdb under the web root with insufficient access control, which allows remote attackers to read the database via a direct request.

Multiple cross-site scripting (XSS) vulnerabilities in Mavili Guestbook, as released in November 2007, allow remote attackers to inject arbitrary web script or HTML via the id parameter to (1) approve.asp, (2) delete.asp, (3) edit.asp, or (4) edit2.asp.

SQL injection vulnerability in edit.asp in Mavili Guestbook, as released in November 2007, allows remote attackers to execute arbitrary SQL commands via the id parameter.

Multiple cross-site scripting (XSS) vulnerabilities in action/add-submit.php in Ggb Guestbook 0.3.1 allow remote attackers to inject arbitrary web script or HTML via the (1) url or (2) message parameter.

Cross-site scripting (XSS) vulnerability in sign.php in tinyguestbook allows remote attackers to inject arbitrary web script or HTML via the msg parameter.

Multiple SQL injection vulnerabilities in sign.php in tinyguestbook allow remote attackers to execute arbitrary SQL commands via the (1) name and (2) msg parameters. NOTE: some of these details are obtained from third party information.