CVE-2020-10101: Zammad

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in non-JSON format are sent by an attacker. The message format is not properly checked and parsing errors not handled. This leads to a crash of the service process.

Affected products

• Zammad Zammad: from 1.0.0, up to and including 3.2.0

Published 2020-03-05. Last modified 2026-06-17.