CVE-2001-1159: Squirrelmail

High severity, CVSS 7.5. EPSS: 3.6% chance of exploitation in the next 30 days.

load_prefs.php and supporting include files in SquirrelMail 1.0.4 and earlier do not properly initialize certain PHP variables, which allows remote attackers to (1) view sensitive files via the config_php and data_dir options, and (2) execute arbitrary code by using options_order.php to upload a message that could be interpreted as PHP.

Affected products

• Squirrelmail Squirrelmail: version 1.0.4 only; version 1.0.5 only

Published 2001-07-02. Last modified 2026-06-16.