CVE-2024-21496

2024-02-1705:00:02

snyk

github.com

xss

cross-site scripting

referer header

input sanitization

javascript url scheme

vulnerability

execution

malicious scripts

browser security

CVSS3

6.1

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

AI Score

5.5

Confidence

High

SSVC

Exploitation

none

Automatable

Technical Impact

partial

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

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