CVE-2024-21494

Name: CVE-2024-21494
Creator: NVD / NIST
Published: 2024-02-17T05:15:09.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2024-21494 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. All versions of the package github.com/greenpau/caddy-security are vulnerable to Authentication Bypass by Spoofing via the X-Forwarded-For header due to improper input sanitization. An attacker can spoof an IP address used in the user identity module (/whoami API endpoint). EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

All versions of the package github.com/greenpau/caddy-security are vulnerable to Authentication Bypass by Spoofing via the X-Forwarded-For header due to improper input sanitization. An attacker can spoof an IP address used in the user identity module (/whoami API endpoint). This could lead to unauthorized access if the system trusts this spoofed IP address.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.52%

40.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Greenpau	Caddy-Security	All versions

References

https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/Third Party Advisory
https://github.com/greenpau/caddy-security/issues/266Issue Tracking
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249859Third Party Advisory
https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/Third Party Advisory
https://github.com/greenpau/caddy-security/issues/266Issue Tracking
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249859Third Party Advisory

Timeline

Published: Feb 17, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-21494?

How severe is CVE-2024-21494?

CVE-2024-21494 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21494?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-21494?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST