Security advisory

{
  "id": "f9615658e4973e6d23a1f810a76cc35306fee2cb05924f4321e5c51dfc83be51",
  "url": "https://osv.dev/vulnerability/CVE-2021-35440",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-35440",
    "summary": "Smashing 1.3.4 is vulnerable to Cross Site Scripting (XSS). A URL for a widget can be crafted and used to execute JavaScript on the victim's computer. The JavaScript code can then steal data available in the session/cookies depending on the user environment (e.g. if re-using internal URL's for deploying, or cookies that are very permissive) private information may be retrieved by the attacker.",
    "evidence": "osv:CVE-2021-35440",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-35440",
      "aliases": [
        "CVE-2021-35440",
        "GHSA-254j-mmc5-qhpx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/smashing/smashing",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5f472645fd69cd395cf2fa0befc4e8e0d673d3be"
                },
                {
                  "last_affected": "5f472645fd69cd395cf2fa0befc4e8e0d673d3be"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:smashing_project:smashing:1.3.4:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.3.4"
                      },
                      {
                        "last_affected": "1.3.4"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3.4",
            "v.1.3.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-35440.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:46.615205572Z",
      "provider": "osv",
      "references": [
        "https://github.com/Smashing/smashing/blob/ad7325f159f89854ca4e7d94e7be9bee507b6d46/CHANGELOG.md",
        "https://github.com/Smashing/smashing/pull/186",
        "https://github.com/Smashing/smashing/pull/186#issuecomment-871727614"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-35440",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386128,
  "published_at": "2021-07-06T15:15:07.757+00:00"
}