CVE-2024-21499

Name: CVE-2024-21499
Creator: NVD / NIST
Published: 2024-02-17T05:15:10.4+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2024-21499 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. All versions of the package github.com/greenpau/caddy-security are vulnerable to HTTP Header Injection via the X-Forwarded-Proto header due to redirecting to the injected protocol.Exploiting this vulnerability could lead to bypass of security mechanisms or confusion in handling TLS.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

All versions of the package github.com/greenpau/caddy-security are vulnerable to HTTP Header Injection via the X-Forwarded-Proto header due to redirecting to the injected protocol.Exploiting this vulnerability could lead to bypass of security mechanisms or confusion in handling TLS.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.50%

38.9th 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/270Issue Tracking
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249863Third 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/270Issue Tracking
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249863Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2024-21499?

How severe is CVE-2024-21499?

CVE-2024-21499 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21499?

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-2024-21499?

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

Scan your code now

Source: NVD / NIST