What is the CVSS score of CVE-2024-21637?

CVE-2024-21637 has a CVSS 3.1 base score of 7.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Authentik are affected by CVE-2024-21637?

Organizations using Authentik face notable risk from CVE-2024-21637, a cross-site scripting vulnerability rated CVSS 7.6.. A patch is available.

How to fix or mitigate CVE-2024-21637?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Verify anti-CSRF tokens and content security policies are enforced.

Authentik CVE-2024-21637

HIGH

Cross-site Scripting (XSS) (CWE-79)

2024-01-11 security-advisories@github.com

XSS Privilege Escalation Authentik

7.6

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.6 HIGH

AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

Patch released

Mar 28, 2026 - 19:34 nvd

Patch available

CVE Published

Jan 11, 2024 - 06:15 nvd

HIGH 7.6

DescriptionGitHub Advisory

Authentik is an open-source Identity Provider. Authentik is a vulnerable to a reflected Cross-Site Scripting vulnerability via JavaScript-URIs in OpenID Connect flows with response_mode=form_post. This relatively user could use the described attacks to perform a privilege escalation. This vulnerability has been patched in versions 2023.10.6 and 2023.8.6.

AnalysisAI

Authentik is an open-source Identity Provider. Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Authentik is an open-source Identity Provider. Authentik is a vulnerable to a reflected Cross-Site Scripting vulnerability via JavaScript-URIs in OpenID Connect flows with response_mode=form_post. This relatively user could use the described attacks to perform a privilege escalation. This vulnerability has been patched in versions 2023.10.6 and 2023.8.6. Affected products include: Goauthentik Authentik.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.