CVE-2002-0490: Instant Web Mail

High severity, CVSS 10.0. EPSS: 2.7% chance of exploitation in the next 30 days.

Instant Web Mail before 0.60 does not properly filter CR/LF sequences, which allows remote attackers to (1) execute arbitrary POP commands via the id parameter in message.php, or (2) modify certain mail message headers via numerous parameters in write.php.

Affected products

• Instant Web Mail Instant Web Mail: version 0.55 only; version 0.56 only; version 0.57 only; version 0.58 only; version 0.59 only

Published 2002-08-12. Last modified 2026-06-16.