Multiple static code injection vulnerabilities in error.php in GuppY 4.5.16 and earlier allow remote attackers to inject arbitrary PHP code into a .inc file in the data/ directory via (1) a REMOTE_ADDR cookie or (2) a cookie specifying an element of the msg array with an error number in the first dimension and 0 in the second dimension, as demonstrated by msg[999][0].

Directory traversal vulnerability in dwnld.php in GuppY 4.5.11 allows remote attackers to overwrite arbitrary files via a "%2E." (mixed encoding) in the pg parameter.

Multiple directory traversal vulnerabilities in GuppY 4.5.9 and earlier allow remote attackers to read and include arbitrary files via (1) the meskin parameter to admin/editorTypetool.php, or the lng parameter to the in admin/inc scripts (2) archbatch.php, (3) dbbatch.php, and (4) nwlmail.php.

Direct static code injection vulnerability in error.php in GuppY 4.5.9 and earlier, when register_globals is disabled, allows remote attackers to execute arbitrary PHP code via the _SERVER[REMOTE_ADDR] parameter, which is injected into a .inc script that is later included by the main script.

Directory traversal vulnerability in printfaq.php in EasyGuppy (Guppy for Windows) 4.5.4 and 4.5.5 allows remote attackers to read arbitrary files via ".." sequences in the pg parameter, which is cleansed for XSS but not directory traversal.

Multiple cross-site scripting (XSS) vulnerabilities in GuppY 4.5.3a and earlier allow remote attackers to inject arbitrary web script or HTML via (1) the pg parameter to printfaq.php, or the (2) Referer or (3) User-Agent HTTP headers, which are not properly handled by error.php.