FluentCMS 2026 Stored XSS via SVG Upload in File Management

{
  "id": "1695082b18c66cecc60558fc0d14a651112cc3321d874cf515242d9e0acf5f05",
  "url": "https://osv.dev/vulnerability/CVE-2025-15549",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "FluentCMS 2026 Stored XSS via SVG Upload in File Management",
    "summary": "FluentCMS 2026 contains a stored cross-site scripting vulnerability that allows authenticated administrators to upload SVG files with embedded JavaScript via the File Management module. Attackers can upload malicious SVG files that execute JavaScript in the browser of any user accessing the uploaded file URL.",
    "evidence": "osv:CVE-2025-15549",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-15549",
      "aliases": [
        "CVE-2025-15549"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/fluentcms/fluentcms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "667b358e762ea86984554b63499b21675d429c23"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.0.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:fluentcms:fluentcms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.0.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.0.5",
            "v0.0.4",
            "v0.0.3",
            "v0.0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-15549.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.361116679Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15549.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-15549",
        "https://www.vulncheck.com/advisories/fluentcms-stored-xss-via-svg-upload-in-file-management",
        "https://github.com/fluentcms/FluentCMS/issues/2404"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15549.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-15549",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490970,
  "published_at": "2026-01-29T19:41:36.216+00:00"
}