All versions of the package github.com/greenpau/caddy-security are vulnerable to Open Redirect via the redirect_url parameter. An attacker could perform a phishing attack and trick users into visiting a malicious website by crafting a convincing URL with this parameter. To exploit this vulnerability, the user must take an action, such as clicking on a portal button or using the browser’s back button, to trigger the redirection.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-21497
• greenpau/caddy-security#268
• https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy
• https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249861