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CVE-2024-21500: Improper Restriction of Excessive Authentication Attempts in github.com/greenpau/caddy-security

February 17, 2024 (updated April 4, 2025)

All versions of the package github.com/greenpau/caddy-security are vulnerable to Improper Restriction of Excessive Authentication Attempts via the two-factor authentication (2FA). Although the application blocks the user after several failed attempts to provide 2FA codes, attackers can bypass this blocking mechanism by automating the application’s full multistep 2FA process.

References

  • blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy
  • github.com/advisories/GHSA-vfph-hjfv-cpv2
  • github.com/greenpau/caddy-security/issues/271
  • nvd.nist.gov/vuln/detail/CVE-2024-21500
  • security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249864

Code Behaviors & Features

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Affected versions

All versions up to 1.1.23

Solution

Unfortunately, there is no solution available yet.

Impact 4.8 MEDIUM

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

Learn more about CVSS

Weakness

  • CWE-307: Improper Restriction of Excessive Authentication Attempts

Source file

go/github.com/greenpau/caddy-security/CVE-2024-21500.yml

Spotted a mistake? Edit the file on GitLab.

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