GSD-2023-43658

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cross-site Scripting (XSS) within the 'email preview' UI when a site has CSP disabled. Having CSP disabled is a non-default configuration, so the vast majority of sites are unaffected. This problem is resolved in the latest version of the discourse-calendar plugin. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.
Aliases
Aliases
CVE-2023-43658
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{
  "GSD": {
    "alias": "CVE-2023-43658",
    "id": "GSD-2023-43658"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-43658"
      ],
      "details": "dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cross-site Scripting (XSS) within the \u0027email preview\u0027 UI when a site has CSP disabled. Having CSP disabled is a non-default configuration, so the vast majority of sites are unaffected. This problem is resolved in the latest version of the discourse-calendar plugin. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.",
      "id": "GSD-2023-43658",
      "modified": "2023-12-13T01:20:44.972217Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2023-43658",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "discourse-calendar",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "\u003c 97883109"
                        }
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            }
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      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
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            "value": "dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cross-site Scripting (XSS) within the \u0027email preview\u0027 UI when a site has CSP disabled. Having CSP disabled is a non-default configuration, so the vast majority of sites are unaffected. This problem is resolved in the latest version of the discourse-calendar plugin. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
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          {
            "description": [
              {
                "cweId": "CWE-79",
                "lang": "eng",
                "value": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6",
            "refsource": "MISC",
            "url": "https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6"
          },
          {
            "name": "https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de",
            "refsource": "MISC",
            "url": "https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de"
          },
          {
            "name": "https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP",
            "refsource": "MISC",
            "url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-3fwj-f6ww-7hr6",
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
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        "nodes": [
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            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:discourse:discourse_calendar:*:*:*:*:*:discourse:*:*",
                "cpe_name": [],
                "versionEndIncluding": "2023-10-16",
                "vulnerable": true
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        "description": {
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            {
              "lang": "en",
              "value": "dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cross-site Scripting (XSS) within the \u0027email preview\u0027 UI when a site has CSP disabled. Having CSP disabled is a non-default configuration, so the vast majority of sites are unaffected. This problem is resolved in the latest version of the discourse-calendar plugin. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum."
            }
          ]
        },
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        "references": {
          "reference_data": [
            {
              "name": "https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP"
            },
            {
              "name": "https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de",
              "refsource": "MISC",
              "tags": [
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              "url": "https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823d14f1059c39644de"
            },
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              "name": "https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6",
              "refsource": "MISC",
              "tags": [
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              "url": "https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6ww-7hr6"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 2.7
        }
      },
      "lastModifiedDate": "2023-10-20T17:47Z",
      "publishedDate": "2023-10-16T22:15Z"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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.



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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.