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.

Thomas R. Pasawicz HyperBook Guestbook 1.30 stores sensitive information under the web root with insufficient access control, which allows remote attackers to download an admin password hash via a direct request for data/gbconfiguration.dat.

Cross-site scripting (XSS) vulnerability in pblguestbook.php in Pixelated By Lev (PBL) Guestbook 1.32 and earlier allows remote attackers to inject arbitrary web script or HTML via the (1) name, (2) message (aka comments), (3) website, and (4) email parameters, which bypasses XSS protection mechanisms that check for SCRIPT tags but not others, as demonstrated by a javascript URI in an onMouseOver attribute and the src attribute in an iframe tag. NOTE: some vectors might overlap CVE-2006-2975, although the use of alternate manipulations makes it unclear.

Multiple PHP remote file inclusion vulnerabilities in mcGuestbook 1.3 allow remote attackers to execute arbitrary PHP code via a URL in the lang parameter to (1) admin.php, (2) ecrire.php, and (3) lire.php. NOTE: it was later reported that the ecrire.php vector also affects 1.2. NOTE: this issue might be limited to a race condition during installation or an improper installation, since a completed installation creates an include file that prevents external control of the $lang variable.

Multiple cross-site scripting (XSS) vulnerabilities in pblguestbook.php in PBL Guestbook 1.31 allow remote attackers to inject arbitrary web script or HTML via javascript in the SRC attribute of IMG tags in the (1) name, (2) email, and (3) website parameter, which bypasses XSS protection mechanisms that check for SCRIPT tags but not IMG. NOTE: portions of this description's details are obtained from third party information.

Justice Guestbook 1.3 allows remote attackers to obtain the full installation path via a direct request to cfooter.php3, which leaks the path in an error message.

guestbook.pl cleanses user-inserted SSI commands by removing text between "<!--" and "-->" separators, which allows remote attackers to execute arbitrary commands when guestbook.pl is run on Apache 1.3.9 and possibly other versions, since Apache allows other closing sequences besides "-->".