Security advisory

{
  "id": "e0ff37426c49d9a56bb99c12bd3cfb590c93a06ab6f38822988b498930ce41d0",
  "url": "https://osv.dev/vulnerability/CVE-2021-25978",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-25978",
    "summary": "Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed.",
    "evidence": "osv:CVE-2021-25978",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-25978",
      "aliases": [
        "CVE-2021-25978",
        "GHSA-4r9c-jghc-cx5m"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apostrophecms/apostrophe",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0ae930a861a077f52c7995d4425b3fecee3775d2"
                },
                {
                  "last_affected": "71221f7463372c0e2c7c7638d9fc6f6b85d38239"
                },
                {
                  "fixed": "c8b94ee9c79468f1ce28e31966cb0e0839165e59"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.63.0"
                      },
                      {
                        "last_affected": "3.3.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c8b94ee9c79468f1ce28e31966cb0e0839165e59"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.3.1",
            "3.3.0",
            "3.2.0",
            "3.1.2",
            "3.1.0",
            "3.0.1",
            "3.0.0",
            "3.0.0-beta.3",
            "3.0.0-beta.2",
            "3.0.0-beta.1.1",
            "3.0.0-beta.1",
            "3.0.0-alpha.7",
            "3.0.0-alpha.6.1",
            "3.0.0-alpha.5",
            "3.0.0-alpha.4.2",
            "3.0.0-alpha.4",
            "3.0.0-alpha.3",
            "3.0.0-alpha.2",
            "3.0.0-alpha.1",
            "2.67.0",
            "2.66.0",
            "2.65.0",
            "2.64.1",
            "2.64.0",
            "2.63.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-25978.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:34.168061370Z",
      "provider": "osv",
      "references": [
        "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-25978",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385604,
  "published_at": "2021-11-07T18:15:07.62+00:00"
}