Vulnerability-Lookup

GHSA-RV3X-XQ3R-8J9H

Vulnerability from github – Published: 2023-06-09 19:32 – Updated: 2023-06-09 19:32

Summary

LeafKit allows XSS with untrusted user input

Details

Impact

This affects anyone passing unsanitised data to Leaf's variable tags. Before this fix, Leaf would not escape any strings passed to tags as variables. If an attacker managed to find a variable that was rendered with their unsanitised data, they could inject scripts into a generated Leaf page, which could enable XSS attacks if other mitigations such as a Content Security Policy were not enabled.

Patches

This has been patched in 1.3.0

Workarounds

Sanitise any untrusted input before passing it to Leaf and enable a CSP to block inline script and CSS data.

References

https://github.com/vapor/leaf-kit-ghsa-rv3x-xq3r-8j9h/pull/1

For more information

If you have any questions or comments about this advisory: * Open an issue in Leaf Kit * Email us at security@vapor.codes

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "SwiftURL",
        "name": "github.com/vapor/leaf-kit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-37634"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79",
      "CWE-80"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-06-09T19:32:32Z",
    "nvd_published_at": "2021-08-09T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nThis affects anyone passing unsanitised data to Leaf\u0027s variable tags. Before this fix, Leaf would not escape any strings passed to tags as variables. If an attacker managed to find a variable that was rendered with their unsanitised data, they could inject scripts into a generated Leaf page, which could enable XSS attacks if other mitigations such as a Content Security Policy were not enabled.\n\n### Patches\nThis has been patched in 1.3.0\n\n### Workarounds\nSanitise any untrusted input before passing it to Leaf and enable a CSP to block inline script and CSS data.\n\n### References\nhttps://github.com/vapor/leaf-kit-ghsa-rv3x-xq3r-8j9h/pull/1\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [Leaf Kit](https://github.com/vapor/leaf-kit)\n* Email us at [security@vapor.codes](mailto:security@vapor.codes)",
  "id": "GHSA-rv3x-xq3r-8j9h",
  "modified": "2023-06-09T19:32:32Z",
  "published": "2023-06-09T19:32:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vapor/leaf-kit/security/advisories/GHSA-rv3x-xq3r-8j9h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-37634"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vapor/leaf-kit"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vapor/leaf-kit/releases/tag/1.3.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "LeafKit allows XSS with untrusted user input"
}

CVE-2021-37634 (GCVE-0-2021-37634)

Vulnerability from cvelistv5 – Published: 2021-08-09 19:45 – Updated: 2024-08-04 01:23

Title

LeafKit allows XSS with untrusted user input

Summary

Leafkit is a templating language with Swift-inspired syntax. Versions prior to 1.3.0 are susceptible to Cross-site Scripting (XSS) attacks. This affects anyone passing unsanitised data to Leaf's variable tags. Before this fix, Leaf would not escape any strings passed to tags as variables. If an attacker managed to find a variable that was rendered with their unsanitised data, they could inject scripts into a generated Leaf page, which could enable XSS attacks if other mitigations such as a Content Security Policy were not enabled. This has been patched in 1.3.0. As a workaround sanitize any untrusted input before passing it to Leaf and enable a CSP to block inline script and CSS data.

Severity ?

7.4 (High)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/vapor/leaf-kit/security/adviso…	x_refsource_CONFIRM
	https://github.com/vapor/leaf-kit-ghsa-rv3x-xq3r-…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	vapor	leaf-kit	Affected: < 1.3.0

Show details on NVD website

JSON

To clipboard

{
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          "dateUpdated": "2024-08-04T01:23:01.289Z",
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        "references": [
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            ],
            "url": "https://github.com/vapor/leaf-kit/security/advisories/GHSA-rv3x-xq3r-8j9h"
          },
          {
            "tags": [
              "x_refsource_MISC",
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            ],
            "url": "https://github.com/vapor/leaf-kit-ghsa-rv3x-xq3r-8j9h/pull/1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "leaf-kit",
          "vendor": "vapor",
          "versions": [
            {
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              "version": "\u003c 1.3.0"
            }
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        }
      ],
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        {
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        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
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            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
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            "privilegesRequired": "NONE",
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            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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            }
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      "providerMetadata": {
        "dateUpdated": "2021-08-09T19:45:13",
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        "discovery": "UNKNOWN"
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        "affects": {
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        "references": {
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-RV3X-XQ3R-8J9H

Impact

Patches

Workarounds

References

For more information

CVE-2021-37634 (GCVE-0-2021-37634)

Tags

Sightings

Nomenclature