FKIE_CVE-2024-21496

Vulnerability from fkie_nvd - Published: 2024-02-17 05:15 - Updated: 2025-12-23 20:09
Severity ?
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
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
report@snyk.iohttps://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/Exploit, Third Party Advisory
report@snyk.iohttps://github.com/greenpau/caddy-security/issues/267Exploit, Issue Tracking
report@snyk.iohttps://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/greenpau/caddy-security/issues/267Exploit, Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860Third Party Advisory
Impacted products
Vendor Product Version
authcrunch caddy-security -
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:authcrunch:caddy-security:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "FEFE7B79-CA27-471B-9450-CFC92FF1A9B4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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": "2025-12-23T20:09:22.520",
  "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",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/"
    },
    {
      "source": "report@snyk.io",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ],
      "url": "https://github.com/greenpau/caddy-security/issues/267"
    },
    {
      "source": "report@snyk.io",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ],
      "url": "https://github.com/greenpau/caddy-security/issues/267"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860"
    }
  ],
  "sourceIdentifier": "report@snyk.io",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "report@snyk.io",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.