5.3

CVE-2021-3754: redhat keycloak Improper Input Validation

CVSS: 5.3v3.1MediumModified
AliasesGHSA-4vc8-pg5c-vg4x
Published 26-08-2022Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-3754 is a medium (CVSS 5.3) Improper Input Validation vulnerability in redhat keycloak. EPSS estimates a 2.15% chance of exploitation in the next 30 days, higher than 81.8% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
2.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-08-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in keycloak where an attacker is able to register himself with the username same as the email ID of any existing user. This may cause trouble in getting password recovery email in case the user forgets the password.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

2.15%

Chance of exploitation in the next 30 days

Percentile

82%

Versus all other CVEs

30-day change

0.00 pp

From 2.15% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat2 products
Org.keycloak1 product
  • keycloak-services< 24.0.1

2 vendors · 3 products

References

6 links