Last updated on October 21, 2015
IBM Domino Web server configured for Webmail is vulnerable to cross-site scripting, caused by improper validation of user-supplied input. A remote attacker could exploit this vulnerability using a specially-crafted URL to execute script in a victim’s Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim’s cookie-based authentication credentials. Note that Domino servers configured for iNotes are not vulnerable to this attack.
See this link for details and how to fix it
