Vulnerability-Lookup

CNVD-2021-40755

Vulnerability from cnvd - Published: 2021-06-10

Title

WellCMS文件上传漏洞

Description

WellCMS是一款开源的具备亿级负载、倾向移动端、轻量级、具有超快反应能力的高负载CMS，是大数据量、高并发访问网站最佳选择的轻CMS。具有安全、高效、稳定、速度超快、负载超强的特点。 WellCMS 2.0存在安全漏洞，该漏洞源于CMS后台上传文件类型校验的不完整。攻击者可利用该漏洞修改上传文件类型来获得webshell。

Severity

高

Patch Name

WellCMS文件上传漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，详情请关注厂商主页： http://www.wellcms.cn/read-27.html&&

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-21005

Impacted products

Name
WellCMS Wellcms v2.0

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-21005"
    }
  },
  "description": "WellCMS\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u5177\u5907\u4ebf\u7ea7\u8d1f\u8f7d\u3001\u503e\u5411\u79fb\u52a8\u7aef\u3001\u8f7b\u91cf\u7ea7\u3001\u5177\u6709\u8d85\u5feb\u53cd\u5e94\u80fd\u529b\u7684\u9ad8\u8d1f\u8f7dCMS\uff0c\u662f\u5927\u6570\u636e\u91cf\u3001\u9ad8\u5e76\u53d1\u8bbf\u95ee\u7f51\u7ad9\u6700\u4f73\u9009\u62e9\u7684\u8f7bCMS\u3002\u5177\u6709\u5b89\u5168\u3001\u9ad8\u6548\u3001\u7a33\u5b9a\u3001\u901f\u5ea6\u8d85\u5feb\u3001\u8d1f\u8f7d\u8d85\u5f3a\u7684\u7279\u70b9\u3002\n\nWellCMS 2.0\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eCMS\u540e\u53f0\u4e0a\u4f20\u6587\u4ef6\u7c7b\u578b\u6821\u9a8c\u7684\u4e0d\u5b8c\u6574\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u4fee\u6539\u4e0a\u4f20\u6587\u4ef6\u7c7b\u578b\u6765\u83b7\u5f97webshell\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8be6\u60c5\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\uff1a\r\nhttp://www.wellcms.cn/read-27.html\u0026\u0026",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-40755",
  "openTime": "2021-06-10",
  "patchDescription": "WellCMS\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u5177\u5907\u4ebf\u7ea7\u8d1f\u8f7d\u3001\u503e\u5411\u79fb\u52a8\u7aef\u3001\u8f7b\u91cf\u7ea7\u3001\u5177\u6709\u8d85\u5feb\u53cd\u5e94\u80fd\u529b\u7684\u9ad8\u8d1f\u8f7dCMS\uff0c\u662f\u5927\u6570\u636e\u91cf\u3001\u9ad8\u5e76\u53d1\u8bbf\u95ee\u7f51\u7ad9\u6700\u4f73\u9009\u62e9\u7684\u8f7bCMS\u3002\u5177\u6709\u5b89\u5168\u3001\u9ad8\u6548\u3001\u7a33\u5b9a\u3001\u901f\u5ea6\u8d85\u5feb\u3001\u8d1f\u8f7d\u8d85\u5f3a\u7684\u7279\u70b9\u3002\r\n\r\nWellCMS 2.0\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eCMS\u540e\u53f0\u4e0a\u4f20\u6587\u4ef6\u7c7b\u578b\u6821\u9a8c\u7684\u4e0d\u5b8c\u6574\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u4fee\u6539\u4e0a\u4f20\u6587\u4ef6\u7c7b\u578b\u6765\u83b7\u5f97webshell\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": "WellCMS\u6587\u4ef6\u4e0a\u4f20\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "WellCMS Wellcms v2.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-21005",
  "serverity": "\u9ad8",
  "submitTime": "2021-06-04",
  "title": "WellCMS\u6587\u4ef6\u4e0a\u4f20\u6f0f\u6d1e"
}

CVE-2020-21005 (GCVE-0-2020-21005)

Vulnerability from cvelistv5 – Published: 2021-06-03 13:54 – Updated: 2024-08-04 14:22

Summary

WellCMS 2.0 beta3 is vulnerable to File Upload. A user can log in to the CMS background and upload a picture. Because the upload file type is controllable, the user can modify the upload file type to get webshell.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://github.com/Computer2200/-/issues/4	x_refsource_MISC
http://www.wellcms.cn/read-27.html&&	x_refsource_MISC

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T14:22:25.501Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
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            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/Computer2200/-/issues/4"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://www.wellcms.cn/read-27.html\u0026\u0026"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "WellCMS 2.0 beta3 is vulnerable to File Upload. A user can log in to the CMS background and upload a picture. Because the upload file type is controllable, the user can modify the upload file type to get webshell."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-06-03T13:54:30.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Computer2200/-/issues/4"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://www.wellcms.cn/read-27.html\u0026\u0026"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-21005",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
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              "value": "WellCMS 2.0 beta3 is vulnerable to File Upload. A user can log in to the CMS background and upload a picture. Because the upload file type is controllable, the user can modify the upload file type to get webshell."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/Computer2200/-/issues/4",
              "refsource": "MISC",
              "url": "https://github.com/Computer2200/-/issues/4"
            },
            {
              "name": "http://www.wellcms.cn/read-27.html\u0026\u0026",
              "refsource": "MISC",
              "url": "http://www.wellcms.cn/read-27.html\u0026\u0026"
            }
          ]
        }
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-21005",
    "datePublished": "2021-06-03T13:54:30.000Z",
    "dateReserved": "2020-08-13T00:00:00.000Z",
    "dateUpdated": "2024-08-04T14:22:25.501Z",
    "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.

Detection rules are retrieved from Rulezet.

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.