All versions of the package github.com/greenpau/caddy-security are vulnerable to Cross-site Scripting (XSS) via the Referer header, due to improper input sanitization. Although the Referer header is sanitized by escaping some characters that can allow XSS (e.g., [&], [<], [>], ["], [']), it does not account for the attack based on the JavaScript URL scheme (e.g., javascript:alert(document.domain)// payload). Exploiting this vulnerability may not be trivial, but it could lead to the execution of malicious scripts in the context of the target user’s browser, compromising user sessions.
References
| Link | 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/267 | Exploit Issue Tracking |
| https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860 | 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/267 | Exploit Issue Tracking |
| https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860 | Third Party Advisory |
Configurations
History
23 Dec 2025, 20:09
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Authcrunch
Authcrunch caddy-security |
|
| CPE | cpe:2.3:a:authcrunch:caddy-security:-:*:*:*:*:*:*:* | |
| References | () https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/ - Exploit, Third Party Advisory | |
| References | () https://github.com/greenpau/caddy-security/issues/267 - Exploit, Issue Tracking | |
| References | () https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860 - Third Party Advisory |
21 Nov 2024, 08:54
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/ - | |
| References | () https://github.com/greenpau/caddy-security/issues/267 - | |
| References | () https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860 - |
17 Feb 2024, 05:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-02-17 05:15
Updated : 2025-12-23 20:09
NVD link : CVE-2024-21496
Mitre link : CVE-2024-21496
CVE.ORG link : CVE-2024-21496
JSON object : View
Products Affected
authcrunch
- caddy-security
CWE
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')