CVE-2009-1579: Squirrelmail

Medium severity, CVSS 6.8. EPSS: 3.4% chance of exploitation in the next 30 days.

The map_yp_alias function in functions/imap_general.php in SquirrelMail before 1.4.18 and NaSMail before 1.7 allows remote attackers to execute arbitrary commands via shell metacharacters in a username string that is used by the ypmatch program.

Affected products

• Squirrelmail Squirrelmail: any version; up to and including 1.4.17; version 0.1 only; version 0.1.1 only; version 0.1.2 only; version 0.2 only; …

Published 2009-05-14. Last modified 2026-06-16.