← Vulnerability feed

Vulnerability record · CVE-2020-21514 · published 4 April 2023

CVE-2020-21514: Fluentd incorrect default permissions vulnerability

Fluentd · Fluentd

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.

8.8 CVSS 3.1 High EPSS 0.79% · top 45.7% CWE-276 · Incorrect default permissions
8.8CVSS 3.1 base score
0.79%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
3References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/fluent/fluentd-ui/issues/295
https://github.com/fluent/fluentd/issues/2722 ExploitIssue Tracking
https://github.com/fluent/fluentd/issues/2722 ExploitIssue Tracking

Track CVE-2020-21514 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-44024Fluentd path traversal vulnerabilityFluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd allo…EPSS 1.1%9.8CVE-2022-39379Fluentd unauthenticated RCE via unsafe JSON deserializationFluentd, when the non-default environment variable FLUENT_OJ_OPTION_MODE is set to object, deserializes untrusted JSON payloads unsafely, allowing re…EPSS 45%analysed9.8CVE-2017-10906Fluentd vulnerabilityEscape sequence injection vulnerability in Fluentd versions 0.12.29 through 0.12.40 may allow an attacker to change the terminal UI or execute arbitr…EPSS 4.6%7.5CVE-2026-44025Fluentd missing authentication for critical function vulnerabilityFluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd's Mo…EPSS 0.47%7.5CVE-2026-44160Fluentd vulnerabilityFluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd's in…EPSS 0.62%7.5CVE-2021-41186Fluentd uncontrolled resource consumption vulnerabilityFluentd collects events from various data sources and writes them to files to help unify logging infrastructure. The parser_apache2 plugin in Fluentd…EPSS 2.2%7.2CVE-2026-44161Fluentd server-side request forgery (ssrf) vulnerabilityFluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, the Fluentd …EPSS 0.44%

Source: NIST National Vulnerability Database (record CVE-2020-21514), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.