What is CVE-2023-43793?

CVE-2023-43793 is a high-severity vulnerability in Misskey, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-10-04.

How severe is CVE-2023-43793?

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

Auth bypass in Misskey

CVE-2023-43793

Misskey is an open source, decentralized social media platform. Prior to version 2023.9.0, by editing the URL, a user can bypass the authentication of the Bull dashboard, which is the job queue management UI, and access it. Version 2023.9.0 contains a fix. There are no known workarounds.

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: 0.007 (50.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Misskey
Misskey-Dev Misskey — versions < 2023.9.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/misskey-dev/misskey/security/advisories/GHSA-9fj2-gjcf-cqqc (Vendor Advisory)
github.com/nexryai/nexkey/security/advisories/GHSA-g8w5-568f-ffwf (Not Applicable)
github.com/misskey-dev/misskey/commit/c9aeccb2ab260ceedc126e6e366da8cd13ece4b2 (Patch)

Frequently asked questions

What is CVE-2023-43793?: CVE-2023-43793 is a high-severity vulnerability in Misskey, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-10-04.
How severe is CVE-2023-43793?: High severity. CVSS v3 base score is 7.5 out of 10.