4.9

CVE-2020-27826: redhat keycloak Execution with Unnecessary Privileges

CVSS: 4.9v2.0MediumModified
AliasesRHSA-2020:5526RHSA-2020:5527RHSA-2020:5528
Published 28-05-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-27826 is a medium (CVSS 4.9) Execution with Unnecessary Privileges vulnerability in redhat keycloak. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 46.4% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v2.0 (NVD)
EPSS score
0.57%
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. 28-05-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in Keycloak before version 12.0.0 where it is possible to update the user's metadata attributes using Account REST API. This flaw allows an attacker to change its own NameID attribute to impersonate the admin user for any particular application.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

0.00 pp

From 0.57% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.57%

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

Redhat4 products
  • keycloak< 12.0.0
  • single_sign-onna | 7.4 | 7.4.4
  • rh-sso7-keycloak< 0:9.0.10-1.redhat_00001.1.el6sso | < 0:9.0.10-1.redhat_00001.1.el7sso | < 0:9.0.10-1.redhat_00001.1.el8sso
  • rh-sso7-keycloak-server< 0:9.0.10-1.redhat_00001.1.el6sso | < 0:9.0.10-1.redhat_00001.1.el7sso | < 0:9.0.10-1.redhat_00001.1.el8sso
Org.keycloak1 product
  • keycloak-core< 12.0.0

2 vendors · 5 products

References

13 links
Show all 13 references