What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-11 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• goauthentik authentik: from 2023.8.0 before 2023.8.6; from 2023.10.0 before 2023.10.6 — fixed in 2023.10.6, 2023.8.6

How to fix

Upgrade to a fixed version: goauthentik authentik 2023.10.6, 2023.8.6. Check the vendor advisory for mitigations.

References

• https://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.6
• https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.6
• https://github.com/goauthentik/authentik/security/advisories/GHSA-rjpr-7w8c-gv3j
• https://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.6
• https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.6
• https://github.com/goauthentik/authentik/security/advisories/GHSA-rjpr-7w8c-gv3j

Get alerted when CVE-2024-21637 or the next vulnerability affects your stack