Symantec Reporting Server, as used in Symantec AntiVirus (SAV) Corporate Edition 10.1 before 10.1 MR8 and 10.2 before 10.2 MR2, Symantec Client Security (SCS) before 3.1 MR8, and the Symantec Endpoint Protection Manager (SEPM) component in Symantec Endpoint Protection (SEP) before 11.0 MR2, allows remote attackers to inject arbitrary text into the login screen, and possibly conduct phishing attacks, via vectors involving a URL that is not properly handled.