CVE-2024-21496

2024-02-1705:00:02

snyk

www.cve.org

cross-site scripting

github.com/greenpau/caddy-security

xss

referer header

javascript url scheme

input sanitization

execution of malicious scripts

user sessions

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

0.0004 Low

EPSS

Percentile

15.7%

JSON

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.

CNA Affected

[
  {
    "product": "github.com/greenpau/caddy-security",
    "versions": [
      {
        "version": "0",
        "lessThan": "*",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "vendor": "n/a"
  }
]