cve-2021-29441

{
  "advisories": [
    {
      "id": "GHSA-36hp-jr8h-556f",
      "source": "ghsa",
      "title": "Authentication Bypass",
      "url": "https://github.com/advisories/GHSA-36hp-jr8h-556f"
    }
  ],
  "cve": "CVE-2021-29441",
  "epss": {
    "score": 0.83483
  },
  "mitre": {
    "cpes": [],
    "created": "2021-04-27T20:20:20+00:00",
    "description": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.",
    "metrics": {
      "cvssV2_0": {},
      "cvssV3_0": {},
      "cvssV3_1": {
        "score": 8.6,
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"
      },
      "cvssV4_0": {}
    },
    "mitre_repo_path": "cves/2021/29xxx/CVE-2021-29441.json",
    "references": [
      "https://github.com/advisories/GHSA-36hp-jr8h-556f",
      "https://github.com/alibaba/nacos/issues/4701",
      "https://github.com/alibaba/nacos/pull/4703"
    ],
    "title": "Authentication bypass",
    "updated": "2024-08-03T22:02:51.975000+00:00",
    "vendors": [],
    "weaknesses": [
      "CWE-290"
    ]
  },
  "nvd": {
    "cpes": [
      "cpe:2.3:a:alibaba:nacos:*:*:*:*:*:*:*:*"
    ],
    "created": "2021-04-27T21:15:07.993000+00:00",
    "description": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.",
    "metrics": {
      "cvssV2_0": {
        "score": 7.5,
        "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"
      },
      "cvssV3_0": {},
      "cvssV3_1": {
        "score": 8.6,
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"
      },
      "cvssV4_0": {}
    },
    "nvd_repo_path": "2021/CVE-2021-29441.json",
    "references": [
      "https://github.com/advisories/GHSA-36hp-jr8h-556f",
      "https://github.com/alibaba/nacos/issues/4701",
      "https://github.com/alibaba/nacos/pull/4703"
    ],
    "title": null,
    "updated": "2026-06-17T03:47:38.877000+00:00",
    "vendors": [
      "alibaba",
      "alibaba$PRODUCT$nacos"
    ],
    "weaknesses": [
      "CWE-290"
    ]
  },
  "opencve": {
    "changes": [],
    "cpes": {
      "data": [
        "cpe:2.3:a:alibaba:nacos:*:*:*:*:*:*:*:*"
      ],
      "providers": [
        "nvd"
      ]
    },
    "created": {
      "data": "2021-04-27T20:20:20+00:00",
      "provider": "mitre"
    },
    "description": {
      "data": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.",
      "provider": "mitre"
    },
    "metrics": {
      "cvssV2_0": {
        "data": {
          "score": 7.5,
          "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"
        },
        "provider": "nvd"
      },
      "cvssV3_0": {
        "data": {},
        "provider": null
      },
      "cvssV3_1": {
        "data": {
          "score": 8.6,
          "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"
        },
        "provider": "mitre"
      },
      "cvssV4_0": {
        "data": {},
        "provider": null
      },
      "epss": {
        "data": {
          "score": 0.83483
        },
        "provider": "first"
      },
      "kev": {
        "data": {},
        "provider": null
      },
      "ssvc": {
        "data": {},
        "provider": null
      },
      "threat_severity": {
        "data": null,
        "provider": null
      }
    },
    "references": {
      "data": [
        "https://github.com/advisories/GHSA-36hp-jr8h-556f",
        "https://github.com/alibaba/nacos/issues/4701",
        "https://github.com/alibaba/nacos/pull/4703"
      ],
      "providers": [
        "mitre",
        "nvd"
      ]
    },
    "title": {
      "data": "Authentication bypass",
      "provider": "mitre"
    },
    "updated": {
      "data": "2024-11-21T06:01:06.293000+00:00",
      "provider": "nvd"
    },
    "vendors": {
      "data": [
        "alibaba",
        "alibaba$PRODUCT$nacos"
      ],
      "providers": [
        "nvd"
      ]
    },
    "weaknesses": {
      "data": [
        "CWE-290"
      ],
      "providers": [
        "mitre",
        "nvd"
      ]
    }
  }
}