Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Marcel Pol Gwolle Guestbook allows Reflected XSS. This issue affects Gwolle Guestbook: from n/a through 4.7.1.

A vulnerability was found in SimplePHPscripts GuestBook Script 2.2. It has been classified as problematic. This affects an unknown part of the file preview.php of the component URL Parameter Handler. The manipulation leads to cross site scripting. It is possible to initiate the attack remotely. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-232755.

Sourcecodester Simple Guestbook Management System version 1 is vulnerable to Cross Site Scripting (XSS) via Name, Referrer, Location, and Comments.

A vulnerability was found in Piwigo-Guest-Book up to 1.3.0. It has been declared as critical. This vulnerability affects unknown code of the file include/guestbook.inc.php of the component Navigation Bar. The manipulation of the argument start leads to sql injection. Upgrading to version 1.3.1 is able to address this issue. The patch is identified as 0cdd1c388edf15089c3a7541cefe7756e560581d. It is recommended to upgrade the affected component. VDB-217582 is the identifier assigned to this vulnerability.

Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Comment Guestbook plugin <= 0.8.0 at WordPress.

A vulnerability was found in Gwolle Guestbook Plugin 1.7.4. It has been rated as problematic. This issue affects some unknown processing. The manipulation leads to basic cross site scripting. The attack may be initiated remotely.

The Gwolle Guestbook WordPress plugin before 4.2.0 does not sanitise and escape the gwolle_gb_user_email parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting issue in an admin page

SyGuestBook A5 Version 1.2 has no CSRF protection mechanism, as demonstrated by CSRF for an index.php?c=Administrator&a=update admin password change.

index.php?c=admin&a=index in SyGuestBook A5 Version 1.2 has stored XSS via a reply to a comment.

SyGuestBook A5 Version 1.2 allows stored XSS because the isValidData function in include/functions.php does not properly block XSS payloads, as demonstrated by a crafted use of the onerror attribute of an IMG element.