CVE-2020-21514: Fluent Fluentd and Fluent-ui use default password

April 4, 2023 (updated June 23, 2025)

An issue was discovered in Fluent-ui v.1.2.2 allows attackers to gain escalated privileges and execute arbitrary code due to a default password.

References

github.com/advisories/GHSA-wrxf-x8rm-6ggg
github.com/fluent/fluentd-ui
github.com/fluent/fluentd-ui/issues/295
github.com/fluent/fluentd/issues/2722
github.com/rubysec/ruby-advisory-db/blob/master/gems/fluentd-ui/CVE-2020-21514.yml
nvd.nist.gov/vuln/detail/CVE-2020-21514

Code Behaviors & Features

Detect and mitigate CVE-2020-21514 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →