CVE-2021-31818: Octopus Server

Medium severity, CVSS 4.3. EPSS: 0.6% chance of exploitation in the next 30 days.

Affected versions of Octopus Server are prone to an authenticated SQL injection vulnerability in the Events REST API because user supplied data in the API request isn’t parameterised correctly. Exploiting this vulnerability could allow unauthorised access to database tables.

Affected products

• Octopus Server: from 2018.9.17, before 2018.13.0 (fixed in 2018.13.0); from 2020.0.0, before 2020.6.0 (fixed in 2020.6.0); from 2020.6.0, before 2020.6.5146 (fixed in 2020.6.5146); from 2021.1.0, before 2021.1.7316 (fixed in 2021.1.7316)

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