Vulnerability-Lookup

CNVD-2021-08888

Vulnerability from cnvd - Published: 2021-02-03

Title

Hedgedoc跨站脚本漏洞（CNVD-2021-08888）

Description

Hedgedoc是Hedgedoc团队的一个基于Javascript的Markdown文档实时编辑分享平台。 HedgeDoc 1.7.2之前版本存在跨站脚本漏洞，攻击者可利用该漏洞注入任意JavaScript。

Severity

中

Patch Name

Hedgedoc跨站脚本漏洞（CNVD-2021-08888）的补丁

Patch Description

Hedgedoc是Hedgedoc团队的一个基于Javascript的Markdown文档实时编辑分享平台。 HedgeDoc 1.7.2之前版本存在跨站脚本漏洞，攻击者可利用该漏洞注入任意JavaScript。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补丁以修复漏洞，补丁获取链接：https://github.com/hedgedoc/hedgedoc/commit/35b0d39a12aa35f27fba8c1f50b1886706e7efef

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-21259

Impacted products

Name
Hedgedoc HedgeDoc <1.7.2

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-21259",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-21259"
    }
  },
  "description": "Hedgedoc\u662fHedgedoc\u56e2\u961f\u7684\u4e00\u4e2a\u57fa\u4e8eJavascript\u7684Markdown\u6587\u6863\u5b9e\u65f6\u7f16\u8f91\u5206\u4eab\u5e73\u53f0\u3002\n\nHedgeDoc 1.7.2\u4e4b\u524d\u7248\u672c\u5b58\u5728\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6ce8\u5165\u4efb\u610fJavaScript\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1ahttps://github.com/hedgedoc/hedgedoc/commit/35b0d39a12aa35f27fba8c1f50b1886706e7efef",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-08888",
  "openTime": "2021-02-03",
  "patchDescription": "Hedgedoc\u662fHedgedoc\u56e2\u961f\u7684\u4e00\u4e2a\u57fa\u4e8eJavascript\u7684Markdown\u6587\u6863\u5b9e\u65f6\u7f16\u8f91\u5206\u4eab\u5e73\u53f0\u3002\r\n\r\nHedgeDoc 1.7.2\u4e4b\u524d\u7248\u672c\u5b58\u5728\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6ce8\u5165\u4efb\u610fJavaScript\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": "Hedgedoc\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff08CNVD-2021-08888\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Hedgedoc HedgeDoc \u003c1.7.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-21259",
  "serverity": "\u4e2d",
  "submitTime": "2021-01-27",
  "title": "Hedgedoc\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff08CNVD-2021-08888\uff09"
}

CVE-2021-21259 (GCVE-0-2021-21259)

Vulnerability from cvelistv5 – Published: 2021-01-22 17:10 – Updated: 2024-08-03 18:09

Title

Stored XSS in slide mode

Summary

HedgeDoc is open source software which lets you create real-time collaborative markdown notes. In HedgeDoc before version 1.7.2, an attacker can inject arbitrary JavaScript into a HedgeDoc note, which is executed when the note is viewed in slide mode. Depending on the configuration of the instance, the attacker may not need authentication to create or edit notes. The problem is patched in HedgeDoc 1.7.2. As a workaround, disallow loading JavaScript from 3rd party sites using the `Content-Security-Policy` header. Note that this will break some embedded content.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N

CWE

CWE-79 - Cross-site Scripting (XSS)

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/hedgedoc/hedgedoc/security/adv…	x_refsource_CONFIRM
https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.2	x_refsource_MISC
https://github.com/hedgedoc/hedgedoc/commit/35b0d…	x_refsource_MISC
https://github.com/hackmdio/codimd/issues/1648	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
hedgedoc	hedgedoc	Affected: < 1.7.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:09:14.988Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-44w9-vm8p-3cxw"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.2"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/hedgedoc/hedgedoc/commit/35b0d39a12aa35f27fba8c1f50b1886706e7efef"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/hackmdio/codimd/issues/1648"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "hedgedoc",
          "vendor": "hedgedoc",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "HedgeDoc is open source software which lets you create real-time collaborative markdown notes. In HedgeDoc before version 1.7.2, an attacker can inject arbitrary JavaScript into a HedgeDoc note, which is executed when the note is viewed in slide mode. Depending on the configuration of the instance, the attacker may not need authentication to create or edit notes. The problem is patched in HedgeDoc 1.7.2. As a workaround, disallow loading JavaScript from 3rd party sites using the `Content-Security-Policy` header. Note that this will break some embedded content."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Cross-site Scripting (XSS)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-06-04T15:46:03.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-44w9-vm8p-3cxw"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.2"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/hedgedoc/hedgedoc/commit/35b0d39a12aa35f27fba8c1f50b1886706e7efef"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/hackmdio/codimd/issues/1648"
        }
      ],
      "source": {
        "advisory": "GHSA-44w9-vm8p-3cxw",
        "discovery": "UNKNOWN"
      },
      "title": "Stored XSS in slide mode",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-21259",
          "STATE": "PUBLIC",
          "TITLE": "Stored XSS in slide mode"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "hedgedoc",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003c 1.7.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "hedgedoc"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
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              "lang": "eng",
              "value": "HedgeDoc is open source software which lets you create real-time collaborative markdown notes. In HedgeDoc before version 1.7.2, an attacker can inject arbitrary JavaScript into a HedgeDoc note, which is executed when the note is viewed in slide mode. Depending on the configuration of the instance, the attacker may not need authentication to create or edit notes. The problem is patched in HedgeDoc 1.7.2. As a workaround, disallow loading JavaScript from 3rd party sites using the `Content-Security-Policy` header. Note that this will break some embedded content."
            }
          ]
        },
        "impact": {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-79 Cross-site Scripting (XSS)"
                }
              ]
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          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-44w9-vm8p-3cxw",
              "refsource": "CONFIRM",
              "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-44w9-vm8p-3cxw"
            },
            {
              "name": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.2",
              "refsource": "MISC",
              "url": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.2"
            },
            {
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            },
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              "name": "https://github.com/hackmdio/codimd/issues/1648",
              "refsource": "MISC",
              "url": "https://github.com/hackmdio/codimd/issues/1648"
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          "advisory": "GHSA-44w9-vm8p-3cxw",
          "discovery": "UNKNOWN"
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  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-21259",
    "datePublished": "2021-01-22T17:10:19.000Z",
    "dateReserved": "2020-12-22T00:00:00.000Z",
    "dateUpdated": "2024-08-03T18:09:14.988Z",
    "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.

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CNVD-2021-08888

CVE-2021-21259 (GCVE-0-2021-21259)

Tags

Sightings

Nomenclature

Related by attack behaviour