How severe is CVE-2024-21637?

CVE-2024-21637 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-21637 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21637?

CVE-2024-21637 affects Goauthentik Authentik. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21637?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-21637 have an EU (EUVD) identifier?

Yes. CVE-2024-21637 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19275.

When was CVE-2024-21637 published?

CVE-2024-21637 was published on 2024-01-11 and last updated on 2026-06-17.

CVE-2024-21637

CVE-2024-21637 is a high-severity vulnerability in Goauthentik Authentik with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19275
Weakness: CWE-79
Affected product: Goauthentik Authentik
Published: 2024-01-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-21637?: 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.
How severe is CVE-2024-21637?: CVE-2024-21637 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-21637 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21637?: CVE-2024-21637 affects Goauthentik Authentik. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21637?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-21637 have an EU (EUVD) identifier?: Yes. CVE-2024-21637 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19275.
When was CVE-2024-21637 published?: CVE-2024-21637 was published on 2024-01-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*

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