Fluent Fluentd and Fluent-ui use default password

published 2023-04-04 3 y ago modified 2026-09-08 2 mo ago also BIT-fluentd-2020-21514 , EUVD-2023-1414 , GHSA-wrxf-x8rm-6ggg

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

bitnami fluentd 1.8.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-21514 updated 2026-11-04 cvss 8.8

fluentd: Default admin credentials not required to change after installation

Red Hat OpenShift Container Platform 3.11 fluentd Red Hat OpenShift Container Platform 4 openshift4/ose-logging-fluentd Red Hat OpenStack Platform 13 (Queens) Operational Tools fluentd Red Hat Virtualization 4 fluentd
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 20 mo ago (2025-02-13)

Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/fluent/fluentd/issues/2722 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
rubygems	fluentd-ui	<=1.2.2	no fix listed
bitnami	fluentd	>=1.8.0, <1.8.1	1.8.1

Classification

Weakness

CWE-276 Incorrect Default Permissions

References

github.com /fluent/fluentd/issues/2722
web, exploit, issue-tracking, evidence
github.com /fluent/fluentd-ui/issues/295
web
nvd.nist.gov /vuln/detail/CVE-2020-21514
advisory, web
github.com /fluent/fluentd-ui
package
github.com /rubysec/ruby-advisory-db/blob/master/gems/fluentd-ui/CVE-2020-21514.yml
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary