What’s Vulnerable › Vulnerabilities

CVE-2022-2166: Improper Restriction of Excessive Authentication Attempts in mastodon/mastodon

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-16 · updated 2026-06-17
• Weakness: CWE-307

Description

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

Affected products

• mastodon: through 3.5.5; 4.0.0-rc1, 4.0.0-rc2, 4.0.0-rc3, 4.0.0-rc4

References

• https://github.com/mastodon/mastodon/commit/21fd25a269cca742af431f0d13299e139f267346
• https://huntr.dev/bounties/2f96f990-01c2-44ea-ae47-58bdb3aa455b
• https://github.com/mastodon/mastodon/commit/21fd25a269cca742af431f0d13299e139f267346
• https://huntr.dev/bounties/2f96f990-01c2-44ea-ae47-58bdb3aa455b

Get alerted when CVE-2022-2166 or the next vulnerability affects your stack