8.8

CVE-2020-21514: fluentd Incorrect Default Permissions

Modified
AliasesGHSA-wrxf-x8rm-6gggBIT-fluentd-2020-21514
Published 04-04-2023Last modified 09-06-2025

Vulnerability summary

CVE-2020-21514 is a high (CVSS 8.8) Incorrect Default Permissions vulnerability in fluentd. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 56.1% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.79%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Timeline

  1. 04-04-2023
    PublishedVulnerability first disclosed.
  2. 09-06-2025
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.79%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.79% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Fluentd

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Fluentd2 products
RubyGems1 product
  • fluentd-ui≤ 1.2.2

2 vendors · 3 products

References

5 links