FKIE_CVE-2025-50578

Vulnerability from fkie_nvd - Published: 2025-07-30 16:15 - Updated: 2025-08-25 02:20
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
LinuxServer.io heimdall 2.6.3-ls307 contains a vulnerability in how it handles user-supplied HTTP headers, specifically `X-Forwarded-Host` and `Referer`. An unauthenticated remote attacker can manipulate these headers to perform Host Header Injection and Open Redirect attacks. This allows the loading of external resources from attacker-controlled domains and unintended redirection of users, potentially enabling phishing, UI redress, and session theft. The vulnerability exists due to insufficient validation and trust of untrusted input, affecting the integrity and trustworthiness of the application.
References
cve@mitre.orghttps://github.com/linuxserver/HeimdallProduct
cve@mitre.orghttps://github.com/linuxserver/Heimdall/issues/1451Exploit, Issue Tracking
cve@mitre.orghttps://medium.com/@juanfelipeoz.rar/cve-2025-50578-exploiting-host-header-injection-open-redirect-in-heimdall-application-733afceff2eaExploit, Third Party Advisory
Impacted products
Vendor Product Version
linuxserver docker-heimdall 2.6.3-ls307
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:linuxserver:docker-heimdall:2.6.3-ls307:*:*:*:*:*:*:*",
              "matchCriteriaId": "58A60C94-36AF-42A5-A1CD-CDA5C3A37F36",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LinuxServer.io heimdall 2.6.3-ls307 contains a vulnerability in how it handles user-supplied HTTP headers, specifically `X-Forwarded-Host` and `Referer`. An unauthenticated remote attacker can manipulate these headers to perform Host Header Injection and Open Redirect attacks. This allows the loading of external resources from attacker-controlled domains and unintended redirection of users, potentially enabling phishing, UI redress, and session theft. The vulnerability exists due to insufficient validation and trust of untrusted input, affecting the integrity and trustworthiness of the application."
    },
    {
      "lang": "es",
      "value": "LinuxServer.io heimdall 2.6.3-ls307 contiene una vulnerabilidad en la gesti\u00f3n de los encabezados HTTP proporcionados por el usuario, espec\u00edficamente \u00abX-Forwarded-Host\u00bb y \u00abReferer\u00bb. Un atacante remoto no autenticado puede manipular estos encabezados para realizar ataques de inyecci\u00f3n de encabezado de host y redirecci\u00f3n abierta. Esto permite la carga de recursos externos desde dominios controlados por el atacante y la redirecci\u00f3n involuntaria de usuarios, lo que podr\u00eda facilitar el phishing, la correcci\u00f3n de la interfaz de usuario y el robo de sesi\u00f3n. La vulnerabilidad existe debido a una validaci\u00f3n y confianza insuficientes en entradas no confiables, lo que afecta la integridad y la fiabilidad de la aplicaci\u00f3n."
    }
  ],
  "id": "CVE-2025-50578",
  "lastModified": "2025-08-25T02:20:27.220",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-07-30T16:15:28.177",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/linuxserver/Heimdall"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ],
      "url": "https://github.com/linuxserver/Heimdall/issues/1451"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://medium.com/@juanfelipeoz.rar/cve-2025-50578-exploiting-host-header-injection-open-redirect-in-heimdall-application-733afceff2ea"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-74"
        },
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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