CVE-2021-21435: Otrs

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

Article Bcc fields and agent personal information are shown when customer prints the ticket (PDF) via external interface. This issue affects: OTRS AG OTRS 7.0.x version 7.0.23 and prior versions; 8.0.x version 8.0.10 and prior versions.

Affected products

• Otrs Otrs: from 6.0.0, up to and including 6.0.30; from 7.0.0, up to and including 7.0.23; from 8.0.0, up to and including 8.0.10

Published 2021-02-08. Last modified 2026-06-17.