CVE-2024-21500
Caddy Security Excessive Authentication Attempt Bypass Vulnerability
Description
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.
INFO
Published Date :
Feb. 17, 2024, 5:15 a.m.
Last Modified :
April 3, 2025, 4:12 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
2.5
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2024-21500 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2024-21500
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-21500.
| URL | Resource |
|---|---|
| https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/ | Exploit Third Party Advisory |
| https://github.com/greenpau/caddy-security/issues/271 | Issue Tracking |
| https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249864 | Third Party Advisory |
| https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/ | Exploit Third Party Advisory |
| https://github.com/greenpau/caddy-security/issues/271 | Issue Tracking |
| https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249864 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Publications from Trail of Bits
conference-presentations academic-papers security-reviews
HTML Python Solidity JavaScript Dockerfile Makefile PHP C
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-21500 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-21500 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 03, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:authcrunch:caddy-security:*:*:*:*:*:*:*:* Added Reference Type CVE: https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/ Types: Exploit, Third Party Advisory Added Reference Type Snyk: https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/ Types: Exploit, Third Party Advisory Added Reference Type CVE: https://github.com/greenpau/caddy-security/issues/271 Types: Issue Tracking Added Reference Type Snyk: https://github.com/greenpau/caddy-security/issues/271 Types: Issue Tracking Added Reference Type CVE: https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249864 Types: Third Party Advisory Added Reference Type Snyk: https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249864 Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Dec. 05, 2024
Action Type Old Value New Value Added CWE CWE-307 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/ Added Reference https://github.com/greenpau/caddy-security/issues/271 Added Reference https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249864 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Received by [email protected]
Feb. 17, 2024
Action Type Old Value New Value Added Description 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. Added Reference Snyk https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249864 [No types assigned] Added Reference Snyk https://github.com/greenpau/caddy-security/issues/271 [No types assigned] Added Reference Snyk https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/ [No types assigned] Added CWE Snyk CWE-307 Added CVSS V3.1 Snyk AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-21500 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-21500
weaknesses.