pysec - pysec-2021-114

pysec-2021-114

Vulnerability from pysec

Published

2021-04-19 19:15

Modified

2021-04-29 14:24

Details

Wagtail is a Django content management system. In affected versions of Wagtail, when saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with javascript: URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. See referenced GitHub advisory for additional details, including a workaround. Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).

Aliases

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "wagtail",
        "purl": "pkg:pypi/wagtail"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.11"
            },
            {
              "fixed": "2.11.7"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "2.11.6"
            },
            {
              "introduced": "2.12"
            },
            {
              "fixed": "2.12.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "0.2",
        "0.3",
        "0.3.1",
        "0.4",
        "0.4.1",
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        "0.8.1",
        "0.8.2",
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        "1.12rc1",
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        "1.12.2",
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        "1.12.5",
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        "1.13rc1",
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        "2.10.2",
        "2.11rc1",
        "2.11",
        "2.11.1",
        "2.11.2",
        "2.11.3",
        "2.11.4",
        "2.11.5",
        "2.11.6",
        "2.12",
        "2.12.1",
        "2.12.2",
        "2.12.3"
      ]
    }
  ],
  "aliases": [
    "CVE-2021-29434",
    "GHSA-wq5h-f9p5-q7fx"
  ],
  "details": "Wagtail is a Django content management system. In affected versions of Wagtail, when saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with `javascript:` URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. See referenced GitHub advisory for additional details, including a workaround. Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).",
  "id": "PYSEC-2021-114",
  "modified": "2021-04-29T14:24:00Z",
  "published": "2021-04-19T19:15:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/wagtail/"
    }
  ]
}

cve-2021-29434

Vulnerability from cvelistv5

Published

2021-04-19 18:45

Modified

2024-08-03 22:02

Severity ?

6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N

Summary

Improper validation of URLs ('Cross-site Scripting') in Wagtail rich text fields

References

▼	URL	Tags
	https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx	x_refsource_CONFIRM
	https://pypi.org/project/wagtail/	x_refsource_MISC

Impacted products

Vendor

Product

Version

▼

wagtail

Version: <= 2.11.6
Version: >= 2.12, <= 2.12.3

Show details on NVD website

JSON

To clipboard

{
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          },
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            "tags": [
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              "x_transferred"
            ],
            "url": "https://pypi.org/project/wagtail/"
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    ],
    "cna": {
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          "versions": [
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          ]
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
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            "scope": "UNCHANGED",
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            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
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              "cweId": "CWE-79",
              "description": "{\"CWE-79\":\"Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}",
              "lang": "en",
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      ],
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      },
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ghsa-wq5h-f9p5-q7fx

Vulnerability from github

Published

2021-04-20 14:02

Modified

2024-11-19 16:02

Severity ?

6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
8.4 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Summary

Improper validation of URLs ('Cross-site Scripting') in Wagtail rich text fields

Details

Impact

When saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with javascript: URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin.

Patches

Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).

Workarounds

For sites that cannot easily upgrade to a current supported version, the vulnerability can be patched by adding the following code to a wagtail_hooks.py module in any installed app:

```python from draftjs_exporter.dom import DOM from wagtail.admin.rich_text.converters.html_to_contentstate import ExternalLinkElementHandler, PageLinkElementHandler from wagtail.core import hooks from wagtail.core.whitelist import check_url

def link_entity(props): id_ = props.get('id') link_props = {}

if id_ is not None:
    link_props['linktype'] = 'page'
    link_props['id'] = id_
else:
    link_props['href'] = check_url(props.get('url'))

return DOM.create_element('a', link_props, props['children'])

@hooks.register('register_rich_text_features', order=1) def register_link(features): features.register_converter_rule('contentstate', 'link', { 'from_database_format': { 'a[href]': ExternalLinkElementHandler('LINK'), 'a[linktype="page"]': PageLinkElementHandler('LINK'), }, 'to_database_format': { 'entity_decorators': {'LINK': link_entity} } }) ```

Acknowledgements

Many thanks to Kevin Breen for reporting this issue.

For more information

If you have any questions or comments about this advisory:

Visit Wagtail's support channels
Email us at security@wagtail.io (if you wish to send encrypted email, the public key ID is 0x6ba1e1a86e0f8ce8)

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.11.6"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "wagtail"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.11.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.12.3"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "wagtail"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.12"
            },
            {
              "fixed": "2.12.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-29434"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-04-19T18:46:26Z",
    "nvd_published_at": "2021-04-19T19:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nWhen saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with `javascript:` URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin.\n\n### Patches\nPatched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).\n\n### Workarounds\nFor sites that cannot easily upgrade to a current supported version, the vulnerability can be patched by adding the following code to a `wagtail_hooks.py` module in any installed app:\n\n```python\nfrom draftjs_exporter.dom import DOM\nfrom wagtail.admin.rich_text.converters.html_to_contentstate import ExternalLinkElementHandler, PageLinkElementHandler\nfrom wagtail.core import hooks\nfrom wagtail.core.whitelist import check_url\n\n\ndef link_entity(props):\n    id_ = props.get(\u0027id\u0027)\n    link_props = {}\n\n    if id_ is not None:\n        link_props[\u0027linktype\u0027] = \u0027page\u0027\n        link_props[\u0027id\u0027] = id_\n    else:\n        link_props[\u0027href\u0027] = check_url(props.get(\u0027url\u0027))\n\n    return DOM.create_element(\u0027a\u0027, link_props, props[\u0027children\u0027])\n\n\n@hooks.register(\u0027register_rich_text_features\u0027, order=1)\ndef register_link(features):\n    features.register_converter_rule(\u0027contentstate\u0027, \u0027link\u0027, {\n        \u0027from_database_format\u0027: {\n            \u0027a[href]\u0027: ExternalLinkElementHandler(\u0027LINK\u0027),\n            \u0027a[linktype=\"page\"]\u0027: PageLinkElementHandler(\u0027LINK\u0027),\n        },\n        \u0027to_database_format\u0027: {\n            \u0027entity_decorators\u0027: {\u0027LINK\u0027: link_entity}\n        }\n    })\n```\n\n### Acknowledgements\nMany thanks to Kevin Breen for reporting this issue.\n\n### For more information\nIf you have any questions or comments about this advisory:\n\n* Visit Wagtail\u0027s [support channels](https://docs.wagtail.io/en/stable/support.html)\n* Email us at security@wagtail.io (if you wish to send encrypted email, the public key ID is `0x6ba1e1a86e0f8ce8`)",
  "id": "GHSA-wq5h-f9p5-q7fx",
  "modified": "2024-11-19T16:02:32Z",
  "published": "2021-04-20T14:02:30Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29434"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wagtail/wagtail/commit/5c7a60977cba478f6a35390ba98cffc2bd41c8a4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wagtail/wagtail/commit/915f6ed2bd7d53154103cc4424a0f18695cdad6c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/wagtail/PYSEC-2021-114.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/wagtail/wagtail"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wagtail/wagtail/compare/v2.11.6...v2.11.7"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/wagtail"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Improper validation of URLs (\u0027Cross-site Scripting\u0027) in Wagtail rich text fields"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

pysec-2021-114

Vulnerability from pysec

cve-2021-29434

Vulnerability from cvelistv5

ghsa-wq5h-f9p5-q7fx

Vulnerability from github

Impact

Patches

Workarounds

Acknowledgements

For more information

Tags

Sightings

Nomenclature