CVE-2022-3782Network attack vector

Unauthenticated redirect bypass via double URL encoding

Published Jan 11, 2023 · Updated Apr 9, 2025

Path traversal in Red Hat build of Keycloak before 20.0.2 allows remote attackers to bypass redirect URI validation. RedirectUtils.verifyRedirectUri validates the encoded path, so double-encoded dot segments can pass a wildcard match before later decoding escapes the permitted path. Exposure requires a client with a wildcard Valid Redirect URIs entry; successful requests can reach unintended URLs and sensitive data within the allowed domain.

CVSS severity9.1
Critical
EPSS probability5.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Red Hat build of Keycloak before 20.0.2 allows remote attackers to bypass redirect URI validation. RedirectUtils.verifyRedirectUri validates the encoded path, so double-encoded dot segments can pass a wildcard match before later decoding escapes the permitted path. Exposure requires a client with a wildcard Valid Redirect URIs entry; successful requests can reach unintended URLs and sensitive data within the allowed domain.

The record

CVE
CVE-2022-3782
Published
Jan 11, 2023
Updated
Apr 9, 2025
Vendor
Red Hat
Product
Red Hat build of Keycloak
Classifications
CWE-22, CWE-177, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20.0.2 <20.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat build of Keycloakversion=20.0.2 <20.0.2

Published CVSS scores

9.1GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-177Improper Handling of URL Encoding (Hex Encoding)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo