CVE-2020-8293: Nextcloud Server

Medium severity, CVSS 6.5. EPSS: 1.6% chance of exploitation in the next 30 days.

A missing input validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows users to store unlimited data in workflow rules causing load and potential DDoS on later interactions and usage with those rules.

Affected products

• Nextcloud Nextcloud Server: before 18.0.11 (fixed in 18.0.11); from 19.0.0, before 19.0.5 (fixed in 19.0.5); from 20.0.0, before 20.0.2 (fixed in 20.0.2)

Published 2021-01-26. Last modified 2026-06-17.