Multiple cross-site scripting (XSS) vulnerabilities in SquirrelMail before 1.4.18 and NaSMail before 1.7 allow remote attackers to inject arbitrary web script or HTML via vectors involving (1) certain encrypted strings in e-mail headers, related to contrib/decrypt_headers.php; (2) PHP_SELF; and (3) the query string (aka QUERY_STRING).

Cross-site scripting (XSS) vulnerability in SquirrelMail before 1.4.17 allows remote attackers to inject arbitrary web script or HTML via a crafted hyperlink in an HTML part of an e-mail message.

Multiple unspecified vulnerabilities in the G/PGP (GPG) Plugin 2.1 for Squirrelmail allow remote attackers to execute arbitrary commands via unspecified vectors. NOTE: this information is based upon a vague pre-advisory from a reliable researcher.

Multiple unspecified vulnerabilities in the G/PGP (GPG) Plugin before 2.1 for Squirrelmail might allow "local authenticated users" to inject certain commands via unspecified vectors. NOTE: this might overlap CVE-2005-1924, CVE-2006-4169, or CVE-2007-3634.