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CVE-2024-21637— XSS in Authentik via JavaScript-URI as Redirect URI and form_post Response Mode

Quick assessment

Affected
goauthentik authentik
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

authentik是authentik开源的一个开源身份提供应用程序。 Authentik 2023.10.5及之前版本，2023.8.5及之前版本存在跨站脚本漏洞，该漏洞源于组件OpenID Connect存在反射型跨站脚本（XSS）漏洞。

CVSS 7.7 · High EPSS 0.55% · P44
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I. Basic Information for CVE-2024-21637

Vulnerability Information
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Vulnerability Title
XSS in Authentik via JavaScript-URI as Redirect URI and form_post Response Mode
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Authentik 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
authentik是authentik开源的一个开源身份提供应用程序。 Authentik 2023.10.5及之前版本，2023.8.5及之前版本存在跨站脚本漏洞，该漏洞源于组件OpenID Connect存在反射型跨站脚本（XSS）漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
goauthentik authentik <= 2023.10.5 -

II. Public POCs for CVE-2024-21637

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6591 chars
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III. Intelligence Information for CVE-2024-21637

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Vendor Advisories for CVE-2024-21637 (1)

Other References for CVE-2024-21637 (1)

IV. Related Vulnerabilities

Same product: authentik
Same vendor: goauthentik
Same weakness: CWE-79

V. Comments for CVE-2024-21637

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