Vulnerability-Lookup

CNVD-2025-20433

Vulnerability from cnvd - Published: 2025-09-05

Title

Emby Server存在未明漏洞

Description

Emby Server是一款个人媒体服务器软件，支持存储、管理和流化个人媒体内容，支持多种设备访问。 Emby Server存在安全漏洞，该漏洞源于允许攻击者通过将X-Forwarded-For标头设置为本地IP地址，进而执行登录绕过攻击。目前没有详细的漏洞细节提供。

Severity

高

Patch Name

Emby Server存在未明漏洞的补丁

Patch Description

Emby Server是一款个人媒体服务器软件，支持存储、管理和流化个人媒体内容，支持多种设备访问。 Emby Server存在安全漏洞，该漏洞源于允许攻击者通过将X-Forwarded-For标头设置为本地IP地址，进而执行登录绕过攻击。目前没有详细的漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级程序修复该安全问题，详情见厂商官网： https://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf

Reference

https://github.com/MediaBrowser/Emby/issues/3784 https://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf https://emby.media/community/index.php?/topic/98191-emby-server-46-released/ https://cxsecurity.com/cveshow/CVE-2021-25827/

Impacted products

Name
Emby Server Emby Server <4.7.12.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-25827",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-25827"
    }
  },
  "description": "Emby Server\u662f\u4e00\u6b3e\u4e2a\u4eba\u5a92\u4f53\u670d\u52a1\u5668\u8f6f\u4ef6\uff0c\u652f\u6301\u5b58\u50a8\u3001\u7ba1\u7406\u548c\u6d41\u5316\u4e2a\u4eba\u5a92\u4f53\u5185\u5bb9\uff0c\u652f\u6301\u591a\u79cd\u8bbe\u5907\u8bbf\u95ee\u3002\n\nEmby Server\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5141\u8bb8\u653b\u51fb\u8005\u901a\u8fc7\u5c06X-Forwarded-For\u6807\u5934\u8bbe\u7f6e\u4e3a\u672c\u5730IP\u5730\u5740\uff0c\u8fdb\u800c\u6267\u884c\u767b\u5f55\u7ed5\u8fc7\u653b\u51fb\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51\uff1a\r\nhttps://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2025-20433",
  "openTime": "2025-09-05",
  "patchDescription": "Emby Server\u662f\u4e00\u6b3e\u4e2a\u4eba\u5a92\u4f53\u670d\u52a1\u5668\u8f6f\u4ef6\uff0c\u652f\u6301\u5b58\u50a8\u3001\u7ba1\u7406\u548c\u6d41\u5316\u4e2a\u4eba\u5a92\u4f53\u5185\u5bb9\uff0c\u652f\u6301\u591a\u79cd\u8bbe\u5907\u8bbf\u95ee\u3002\r\n\r\nEmby Server\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5141\u8bb8\u653b\u51fb\u8005\u901a\u8fc7\u5c06X-Forwarded-For\u6807\u5934\u8bbe\u7f6e\u4e3a\u672c\u5730IP\u5730\u5740\uff0c\u8fdb\u800c\u6267\u884c\u767b\u5f55\u7ed5\u8fc7\u653b\u51fb\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Emby Server\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Emby Server Emby Server \u003c4.7.12.0"
  },
  "referenceLink": "https://github.com/MediaBrowser/Emby/issues/3784\r\nhttps://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf\r\nhttps://emby.media/community/index.php?/topic/98191-emby-server-46-released/\r\nhttps://cxsecurity.com/cveshow/CVE-2021-25827/",
  "serverity": "\u9ad8",
  "submitTime": "2023-07-12",
  "title": "Emby Server\u5b58\u5728\u672a\u660e\u6f0f\u6d1e"
}

CVE-2021-25827 (GCVE-0-2021-25827)

Vulnerability from cvelistv5 – Published: 2023-06-28 00:00 – Updated: 2025-02-13 16:27

Summary

Emby Server < 4.7.12.0 is vulnerable to a login bypass attack by setting the X-Forwarded-For header to a local IP-address.

Severity

No CVSS data available.

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-12-03 16:50 UTC

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://emby.media/community/index.php?/topic/981…
https://github.com/MediaBrowser/Emby/issues/3784
https://github.com/EmbySupport/security/security/…

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:11:28.415Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://emby.media/community/index.php?/topic/98191-emby-server-46-released/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/MediaBrowser/Emby/issues/3784"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-25827",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-12-03T16:50:24.601886Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-12-03T16:50:33.342Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Emby Server \u003c 4.7.12.0 is vulnerable to a login bypass attack by setting the X-Forwarded-For header to a local IP-address."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-06-28T19:31:05.242Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://emby.media/community/index.php?/topic/98191-emby-server-46-released/"
        },
        {
          "url": "https://github.com/MediaBrowser/Emby/issues/3784"
        },
        {
          "url": "https://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-25827",
    "datePublished": "2023-06-28T00:00:00.000Z",
    "dateReserved": "2021-01-22T00:00:00.000Z",
    "dateUpdated": "2025-02-13T16:27:50.814Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CNVD-2025-20433

CVE-2021-25827 (GCVE-0-2021-25827)

Tags

Sightings

Nomenclature

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