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Authentik CVE-2024-52289

HIGH
Incorrect Regular Expression (CWE-185)
2024-11-21 security-advisories@github.com
7.9
CVSS 4.0 · Vendor: github
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Incorrect input validation
Impact

CVSS score of 7.9 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 1.1% exploitation probability (EPSS)

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AnalysisAI

authentik is an open-source identity provider. Rated high severity (CVSS 7.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-185. authentik is an open-source identity provider. Redirect URIs in the OAuth2 provider in authentik are checked by RegEx comparison. When no Redirect URIs are configured in a provider, authentik will automatically use the first redirect_uri value received as an allowed redirect URI, without escaping characters that have a special meaning in RegEx. Similarly, the documentation did not take this into consideration either. Given a provider with the Redirect URIs set to https://foo.example.com, an attacker can register a domain fooaexample.com, and it will correctly pass validation. authentik 2024.8.5 and 2024.10.3 fix this issue. As a workaround, When configuring OAuth2 providers, make sure to escape any wildcard characters that are not intended to function as a wildcard, for example replace . with \.. Affected products include: Goauthentik Authentik.

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Severity by source

Vendor (github) PRIMARY 7.9 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

Primary rating from Vendor (github) · only source for this CVE.

CVSS VectorVendor: github

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
High
Subsequent system: Integrity
High
Subsequent system: Availability
High

DescriptionCVE.org

authentik is an open-source identity provider. Redirect URIs in the OAuth2 provider in authentik are checked by RegEx comparison. When no Redirect URIs are configured in a provider, authentik will automatically use the first redirect_uri value received as an allowed redirect URI, without escaping characters that have a special meaning in RegEx. Similarly, the documentation did not take this into consideration either. Given a provider with the Redirect URIs set to https://foo.example.com, an attacker can register a domain fooaexample.com, and it will correctly pass validation. authentik 2024.8.5 and 2024.10.3 fix this issue. As a workaround, When configuring OAuth2 providers, make sure to escape any wildcard characters that are not intended to function as a wildcard, for example replace . with \..

Threat Intelligence Overview

EPSS Score
1.1%
Top 39% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 1.1%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

41
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +40
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*
cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*
CVE-2023-48228 CRITICAL POC
9.8 Nov 21

authentik is an open-source identity provider. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploi

CVE-2022-23555 HIGH POC
8.8 Dec 28

authentik is an open-source Identity Provider focused on flexibility and versatility. Rated high severity (CVSS 8.8), th

CVE-2022-46172 MEDIUM POC
6.4 Dec 28

authentik is an open-source Identity provider focused on flexibility and versatility. Rated medium severity (CVSS 6.4),

CVE-2026-49448 CRITICAL
9.8 Jun 02

Authentication bypass in authentik identity provider (versions prior to 2025.12.6, 2026.2.4, and 2026.5.1) allows remote

CVE-2024-38371 CRITICAL
9.8 Jun 28

authentik is an open-source Identity Provider. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploi

CVE-2023-46249 CRITICAL
9.8 Oct 31

authentik is an open-source Identity Provider. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploi

CVE-2022-46145 CRITICAL
9.8 Dec 02

authentik is an open-source identity provider. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploi

CVE-2025-52553 CRITICAL
9.6 Jun 27

authentik is an open-source identity provider. After authorizing access to a RAC endpoint, authentik creates a token whi

CVE-2026-57580 CRITICAL
9.4 Aug 18

Account takeover in authentik (goauthentik) identity provider before 2026.2.6 and 2026.5.5 allows an attacker holding an

CVE-2026-42849 CRITICAL
9.3 Jun 02

Cross-site scripting in authentik identity provider versions prior to 2025.12.5 and 2026.2.3 allows remote attackers to

CVE-2026-25227 CRITICAL
9.1 Feb 12

Code injection in authentik identity provider from 2021.3.1 through multiple versions. Users with delegated permissions

CVE-2024-47070 CRITICAL
9.0 Sep 27

authentik is an open-source identity provider. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploi

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