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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-21494
• greenpau/caddy-security#266
• https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy
• https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249859