Vulnerability-Lookup

GHSA-FX3V-553X-3C4Q

Vulnerability from github – Published: 2020-11-23 19:47 – Updated: 2021-03-04 18:24

Summary

Stored XSS by authenticated backend user with access to upload files

Details

Impact

Backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website's domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target's browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed.

Patches

Issue has been patched in Build 469 (v1.0.469) & v1.1.0.

Workarounds

Apply https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4 to your installation manually if unable to upgrade to Build 469 or v1.1.0.

References

Reported by Hoan Hoang

For more information

If you have any questions or comments about this advisory: * Email us at hello@octobercms.com

Threat assessment:

Screen Shot 2020-10-10 at 1 47 49 PM

Severity

2.8 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "october/backend"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0.319"
            },
            {
              "fixed": "1.0.469"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-15249"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-11-23T19:47:07Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Impact\nBackend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website\u0027s domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target\u0027s browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed.\n\n### Patches\nIssue has been patched in Build 469 (v1.0.469) \u0026 v1.1.0.\n\n### Workarounds\nApply https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4 to your installation manually if unable to upgrade to Build 469 or v1.1.0.\n\n### References\nReported by [Hoan Hoang](https://github.com/hoanhp)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [hello@octobercms.com](mailto:hello@octobercms.com)\n\n### Threat assessment:\n\u003cimg width=\"1107\" alt=\"Screen Shot 2020-10-10 at 1 47 49 PM\" src=\"https://user-images.githubusercontent.com/7253840/95663787-378f2b80-0aff-11eb-8dfc-b97d162939da.png\"\u003e",
  "id": "GHSA-fx3v-553x-3c4q",
  "modified": "2021-03-04T18:24:54Z",
  "published": "2020-11-23T19:47:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-15249"
    },
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Stored XSS by authenticated backend user with access to upload files"
}

CVE-2020-15249 (GCVE-0-2020-15249)

Vulnerability from cvelistv5 – Published: 2020-11-23 19:50 – Updated: 2024-08-04 13:08

Title

Stored XSS by authenticated backend user with access to upload files

Summary

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1.0.469, backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website's domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target's browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed. Issue has been patched in Build 469 (v1.0.469) & v1.1.0.

Severity

2.8 (Low)


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

CWE

CWE-79 - Cross-site Scripting (XSS)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8033 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/octobercms/library/commit/80aa…	x_refsource_MISC
https://github.com/octobercms/october/security/ad…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
octobercms	october	Affected: >= 1.0.319, < 1.0.469

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T13:08:23.190Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4q"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "october",
          "vendor": "octobercms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0.319, \u003c 1.0.469"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1.0.469, backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website\u0027s domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target\u0027s browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed. Issue has been patched in Build 469 (v1.0.469) \u0026 v1.1.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 2.8,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Cross-site Scripting (XSS)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-11-23T19:50:14.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4q"
        }
      ],
      "source": {
        "advisory": "GHSA-fx3v-553x-3c4q",
        "discovery": "UNKNOWN"
      },
      "title": "Stored XSS by authenticated backend user with access to upload files",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2020-15249",
          "STATE": "PUBLIC",
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        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "october",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003e= 1.0.319, \u003c 1.0.469"
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                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "octobercms"
              }
            ]
          }
        },
        "data_format": "MITRE",
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        "data_version": "4.0",
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              "name": "https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4",
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    "state": "PUBLISHED"
  },
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}

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.

Vulnerability timeline

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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.
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Action not permitted

GHSA-FX3V-553X-3C4Q

Impact

Patches

Workarounds

References

For more information

Threat assessment:

CVE-2020-15249 (GCVE-0-2020-15249)

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Nomenclature

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