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Vulnerability record · CVE-2022-2166 · published 16 November 2022

CVE-2022-2166: Joinmastodon mastodon improper restriction of authentication attempts vulnerability

Joinmastodon · Mastodon

Improper Restriction of Excessive Authentication Attempts in GitHub repository mastodon/mastodon prior to 4.0.0.

9.8 CVSS 3.1 Critical EPSS 1.1% · top 35.2% CWE-307 · Improper restriction of authentication attempts
9.8CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Improper Restriction of Excessive Authentication Attempts in GitHub repository mastodon/mastodon prior to 4.0.0.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/mastodon/mastodon/commit/21fd25a269cca742af431f0d13299e139f267346 PatchThird Party Advisory
https://huntr.dev/bounties/2f96f990-01c2-44ea-ae47-58bdb3aa455b Third Party Advisory
https://github.com/mastodon/mastodon/commit/21fd25a269cca742af431f0d13299e139f267346 PatchThird Party Advisory
https://huntr.dev/bounties/2f96f990-01c2-44ea-ae47-58bdb3aa455b Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-2166), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.