Cross-site scripting (XSS) vulnerability in ow-shared.pl in OpenWebMail (OWM) 2.51 and earlier allows remote attackers to inject arbitrary web script or HTML via the sessionid parameter in (1) openwebmail-send.pl, (2) openwebmail-advsearch.pl, (3) openwebmail-folder.pl, (4) openwebmail-prefs.pl, (5) openwebmail-abook.pl, (6) openwebmail-read.pl, (7) openwebmail-cal.pl, and (8) openwebmail-webdisk.pl.  NOTE: the openwebmail-main.pl vector is already covered by CVE-2005-2863.