CVE-2019-9149: Mailvelope

Medium severity, CVSS 6.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Mailvelope prior to 3.3.0 allows private key operations without user interaction via its client-API. By modifying an URL parameter in Mailvelope, an attacker is able to sign (and encrypt) arbitrary messages with Mailvelope, assuming the private key password is cached. A second vulnerability allows an attacker to decrypt an arbitrary message when the GnuPG backend is used in Mailvelope.

Affected products

• Mailvelope Mailvelope: before 3.3.0 (fixed in 3.3.0)

Published 2019-07-09. Last modified 2026-06-17.