Discourse Placeholder Forms has a XSS stopped by CSP

{
  "id": "f9398a23ed5c80dbf97cc09d0b342d083a3c58df679e4c22b9a946a009a5735d",
  "url": "https://osv.dev/vulnerability/CVE-2024-43408",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Discourse Placeholder Forms has a XSS stopped by CSP",
    "summary": "Discourse Placeholder Forms will let you build dynamic documentation. Unsanitized and stored user input was injected in the html of the post. The vulnerability is fixed in commit a62f711d5600e4e5d86f342d52932cb6221672e7.",
    "evidence": "osv:CVE-2024-43408",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-43408",
      "aliases": [
        "CVE-2024-43408",
        "GHSA-9wx4-cmv3-g5jw"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/discourse/discourse-placeholder-theme-component",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a62f711d5600e4e5d86f342d52932cb6221672e7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "a62f711d5600e4e5d86f342d52932cb6221672e7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a62f711d5600e4e5d86f342d52932cb6221672e7"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43408.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.017188521Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43408.json",
        "https://github.com/discourse/discourse-placeholder-theme-component/security/advisories/GHSA-9wx4-cmv3-g5jw",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-43408",
        "https://github.com/discourse/discourse-placeholder-theme-component/commit/a62f711d5600e4e5d86f342d52932cb6221672e7"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43408.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-43408",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495677,
  "published_at": "2024-08-20T16:28:48.424+00:00"
}