CVE-2021-37746: Claws-Mail

Medium severity, CVSS 6.1. EPSS: 1.2% chance of exploitation in the next 30 days.

textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.

Affected products

• Claws-Mail Claws-Mail: before 3.18.0 (fixed in 3.18.0)
• Fedoraproject Fedora: version 33 only; version 34 only
• Sylpheed Project Sylpheed: up to and including 3.7.0

Published 2021-07-30. Last modified 2026-06-17.