What is CVE-2023-43805?

CVE-2023-43805 is a high-severity vulnerability in Nexryai Nexkey, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-10-04.

How severe is CVE-2023-43805?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Nexryai Nexkey

CVE-2023-43805

Nexkey is a fork of Misskey, an open source, decentralized social media platform. Prior to version 12.121.9, incomplete URL validation can allow users to bypass authentication for access to the job queue dashboard. Version 12.121.9 contains a fix for this issue. As a workaround, it may be possible to avoid this by blocking access using tools such as Cloudflare's WAF.

Vulnerability class: Broken Authentication

Published 2023-10-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Nexryai Nexkey — versions < 12.121.9

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/nexryai/nexkey/security/advisories/GHSA-g8w5-568f-ffwf (Vendor Advisory)
github.com/misskey-dev/misskey/security/advisories/GHSA-9fj2-gjcf-cqqc (Not Applicable)
github.com/nexryai/nexkey/commit/d89575c521fd4492f5e2ba5a221c5e8f1382081d (Patch)

Frequently asked questions

What is CVE-2023-43805?: CVE-2023-43805 is a high-severity vulnerability in Nexryai Nexkey, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-10-04.
How severe is CVE-2023-43805?: High severity. CVSS v3 base score is 7.5 out of 10.