CVE-2024-23647

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 58% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Authentik is an open-source Identity Provider. There is a bug in our implementation of PKCE that allows an attacker to circumvent the protection that PKCE offers. PKCE adds the code_challenge parameter to the authorization request and adds the code_verifier parameter to the token request. Prior to 2023.8.7 and 2023.10.7, a downgrade scenario is possible: if the attacker removes the code_challenge parameter from the authorization request, authentik will not do the PKCE check. Because of this bug, an attacker can circumvent the protection PKCE offers, such as CSRF attacks and code injection attacks. Versions 2023.8.7 and 2023.10.7 fix the issue.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
42.3%
KEV
Not listed

Published

January 30, 2024

Last Modified

November 21, 2024

References (4)

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
goauthentik.io———

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 108 total refreshes for this CVE.

  1. 2026-07-23 02:34 UTCEG score recompute
  2. 2026-07-22 23:20 UTCEG score recompute
  3. 2026-07-22 14:07 UTCEPSS rescore
  4. 2026-07-21 15:23 UTCEPSS rescore
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  17. 2026-07-14 21:10 UTCOSV refresh
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  1. 2026-07-07 13:45 UTCEPSS rescore
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  18. 2026-06-26 22:07 UTCOSV refresh
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  49. 2026-06-09 09:30 UTCOSV refresh
  50. 2026-06-08 14:16 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2024-23647?
CVE-2024-23647 is a medium vulnerability published on January 30, 2024. Authentik is an open-source Identity Provider. There is a bug in our implementation of PKCE that allows an attacker to circumvent the protection that PKCE offers. PKCE adds the codechallenge parameter to the authorization request and adds the codeverifier parameter to the token request. Prior to…
When was CVE-2024-23647 disclosed?
CVE-2024-23647 was first published in the National Vulnerability Database on January 30, 2024, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-23647 actively exploited?
CVE-2024-23647 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-23647?
CVE-2024-23647 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2024-23647?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-23647, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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