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6.1
MEDIUM CVSS 3.1
CVE-2021-20323
Keycloak Cross Site Scripting (XSS)
Description

A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak.

INFO

Published Date :

March 25, 2022, 7:15 p.m.

Last Modified :

Nov. 21, 2024, 5:46 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2021-20323 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat keycloak
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
Public PoC/Exploit Available at Github

CVE-2021-20323 has a 12 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-20323.

URL Resource
https://bugzilla.redhat.com/show_bug.cgi?id=2013577 Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2013577 Issue Tracking Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-20323 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-20323 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
Sunjid-Ahmed/reconftw-main

None

Dockerfile Makefile Shell HCL

Updated: 2 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : June 19, 2025, 4:54 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
DmitriiKuzmi4ev/casualStories

None

Dockerfile Makefile Shell HCL

Updated: 4 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : April 8, 2025, 5:21 a.m. This repo has been linked 2 different CVEs too.
Profile Photo
sabbir-wp/reconftwtest

None

Dockerfile Makefile Shell HCL

Updated: 5 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : March 7, 2025, 9:06 a.m. This repo has been linked 2 different CVEs too.
Profile Photo
carlosalbertotuma/Keycloak-Sniper

None

Python

Updated: 5 months, 1 week ago
22 stars 5 fork 5 watcher
Born at : Jan. 2, 2025, 7:52 p.m. This repo has been linked 3 different CVEs too.
Profile Photo
cscpwn0sec/CVE-2021-20323

Exploitation Scanner Cross Site Scripting vulnerability in Keycloak.

cve-2021-20323 keycloak-vulnerability cross-site-scripting-xss

Python

Updated: 1 year, 1 month ago
0 stars 0 fork 0 watcher
Born at : July 7, 2024, 11:02 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
Cappricio-Securities/CVE-2021-20323

A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak.

cve keycloak websecurity xss xss-vulnerability cve-2021-20323

Python

Updated: 1 year, 1 month ago
2 stars 1 fork 1 watcher
Born at : Jan. 11, 2024, 4:02 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
Rasuchan/CVE-tool

CVE_Tool

Updated: 1 year, 7 months ago
0 stars 0 fork 0 watcher
Born at : Jan. 8, 2024, 4:38 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
whoforget/CVE-POC

None

Updated: 2 years, 5 months ago
0 stars 2 fork 2 watcher
Born at : April 8, 2023, 6:19 a.m. This repo has been linked 928 different CVEs too.
Profile Photo
k0mi-tg/CVE-POC

None

Updated: 1 year, 6 months ago
20 stars 3 fork 3 watcher
Born at : Feb. 14, 2023, 6:10 p.m. This repo has been linked 921 different CVEs too.
Profile Photo
ndmalc/CVE-2021-20323

None

Updated: 1 month, 1 week ago
12 stars 1 fork 1 watcher
Born at : Dec. 7, 2022, 9:15 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
six2dez/reconftw

reconFTW is a tool designed to perform automated recon on a target domain by running the best set of tools to perform scanning and finding out vulnerabilities

bugbounty hacking recon pentest subdomain nuclei vulnerabilities scanner fuzzing osint penetration-testing pentesting reconnaissance dns pentest-tool security security-tools bug-bounty

Shell Dockerfile HCL Makefile

Updated: 1 month, 1 week ago
6477 stars 980 fork 980 watcher
Born at : Dec. 30, 2020, 11:52 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
ARPSyndicate/kenzer-templates

essential templates for kenzer [DEPRECATED]

kenzer vulnerabilities kenzer-templates arpsyndicate

Python Shell Ruby

Updated: 1 month, 4 weeks ago
117 stars 38 fork 38 watcher
Born at : Sept. 18, 2020, 9:03 p.m. This repo has been linked 1655 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-20323 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2021-20323 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2013577
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Mar. 29, 2022

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2013577 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2013577 Issue Tracking, Third Party Advisory
    Added CWE NIST CWE-79
    Added CPE Configuration OR *cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:* versions up to (excluding) 17.0.0
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 4.3
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

66.05 }} -4.03%

score

0.98447

percentile