How severe is CVE-2023-43793?

CVE-2023-43793 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-43793 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43793?

CVE-2023-43793 affects Misskey. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43793?

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.

When was CVE-2023-43793 published?

CVE-2023-43793 was published on 2023-10-04 and last updated on 2026-06-17.

CVE-2023-43793

CVE-2023-43793 is a high-severity vulnerability in Misskey with a CVSS 3.x base score of 7.5. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Misskey
Published: 2023-10-04
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2023-43793?: CVE-2023-43793 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-43793 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43793?: CVE-2023-43793 affects Misskey. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43793?: 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.
When was CVE-2023-43793 published?: CVE-2023-43793 was published on 2023-10-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*

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