{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2024-21496"
      ],
      "details": "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., [\u0026], [\u003c], [\u003e], [\"], [\u0027]), 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\u2019s browser, compromising user sessions.",
      "id": "GSD-2024-21496",
      "modified": "2023-12-23T06:02:09.459473Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "report@snyk.io",
        "ID": "CVE-2024-21496",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "github.com/greenpau/caddy-security",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "0",
                          "version_value": "*"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "Maciej Domanski"
        },
        {
          "lang": "en",
          "value": "Travis Peters"
        },
        {
          "lang": "en",
          "value": "David Pokora"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "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., [\u0026], [\u003c], [\u003e], [\"], [\u0027]), 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\u2019s browser, compromising user sessions."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-79",
                "lang": "eng",
                "value": "Cross-site Scripting (XSS)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860",
            "refsource": "MISC",
            "url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860"
          },
          {
            "name": "https://github.com/greenpau/caddy-security/issues/267",
            "refsource": "MISC",
            "url": "https://github.com/greenpau/caddy-security/issues/267"
          },
          {
            "name": "https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/",
            "refsource": "MISC",
            "url": "https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "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., [\u0026], [\u003c], [\u003e], [\"], [\u0027]), 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\u2019s browser, compromising user sessions."
          },
          {
            "lang": "es",
            "value": "Todas las versiones del paquete github.com/greenpau/caddy-security son vulnerables a Cross-site Scripting (XSS) a trav\u00e9s del encabezado Referer, debido a una desinfecci\u00f3n de entrada inadecuada. Aunque el encabezado Referer se desinfecta mediante el escape de algunos caracteres que pueden permitir XSS (por ejemplo, [\u0026amp;], [\u0026lt;], [\u0026gt;], [\"], [\u0027]), no tiene en cuenta el ataque basado en el esquema de URL de JavaScript (por ejemplo, javascript:alert(document.domain)// payload). Explotar esta vulnerabilidad puede no ser trivial, pero podr\u00eda llevar a la ejecuci\u00f3n de scripts maliciosos en el contexto del navegador del usuario objetivo, comprometiendo las sesiones del usuario."
          }
        ],
        "id": "CVE-2024-21496",
        "lastModified": "2024-02-20T19:50:53.960",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.1,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 2.7,
              "source": "report@snyk.io",
              "type": "Secondary"
            }
          ]
        },
        "published": "2024-02-17T05:15:09.603",
        "references": [
          {
            "source": "report@snyk.io",
            "url": "https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/"
          },
          {
            "source": "report@snyk.io",
            "url": "https://github.com/greenpau/caddy-security/issues/267"
          },
          {
            "source": "report@snyk.io",
            "url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860"
          }
        ],
        "sourceIdentifier": "report@snyk.io",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-79"
              }
            ],
            "source": "report@snyk.io",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}