HTMLy CMS 3.1.1 Path Traversal via oldfile Parameter in Autosave

{
  "id": "289145a39a3c91bf537c479617824bd4b89073e4a9a8b1e7dc6d3f02b866cc36",
  "url": "https://osv.dev/vulnerability/CVE-2026-45233",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "HTMLy CMS 3.1.1 Path Traversal via oldfile Parameter in Autosave",
    "summary": "HTMLy CMS through 3.1.1 contains a path traversal vulnerability that allows low-privileged authenticated attackers to relocate arbitrary files by supplying directory traversal sequences in the oldfile parameter at the admin autosave endpoint. Attackers can pass unsanitized traversal sequences directly to file_exists() and rename() functions in admin.php without canonicalization or directory boundary enforcement to cause unintended relocation of any file writable by the web server process to an attacker-specified draft location.",
    "evidence": "osv:CVE-2026-45233",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-45233",
      "aliases": [
        "CVE-2026-45233"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/danpros/htmly",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "dde01601bd9e64eaff695814d03c1f31d9eb8f37"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.1.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.1.1",
            "v3.1.0",
            "v3.0.9",
            "v3.0.8",
            "v3.0.7",
            "v3.0.6",
            "v3.0.5",
            "v3.0.4",
            "v3.0.3",
            "v3.0.2",
            "v3.0.1",
            "v3.0.0",
            "v2.9.9",
            "v2.9.8",
            "v2.9.7",
            "v2.9.6",
            "v2.9.5",
            "v2.9.4",
            "v2.9.3",
            "v2.9.2",
            "v2.9.1",
            "v2.9.0",
            "v2.8.9",
            "v2.8.8",
            "v2.8.7",
            "v.2.8.6",
            "v2.8.5",
            "v2.8.4",
            "v2.8.3",
            "v2.8.2",
            "v2.8.1",
            "v2.8.0",
            "v2.7.9",
            "v2.7.8",
            "v2.7.7",
            "v2.7.6",
            "v2.7.5",
            "v2.7.4",
            "v2.7.3",
            "v2.7.2",
            "v2.7.1",
            "v2.7.0",
            "v2.6.9",
            "v2.6.8",
            "v2.6.7",
            "v2.6.6",
            "v2.6.5",
            "v2.6.4",
            "v2.6.3",
            "v2.6.2",
            "v2.6.1",
            "v2.6.0",
            "v2.5.9",
            "v2.5.8",
            "v2.5.7",
            "v2.5.6",
            "v2.5.5",
            "v2.5.4",
            "v2.5.3",
            "v2.5.2",
            "v2.4.1",
            "v2.5.1",
            "v2.5",
            "v2.4",
            "v2.3",
            "v2.2",
            "v2.1",
            "v2.0",
            "v1.9",
            "v1.8",
            "v1.7",
            "v1.6",
            "v1.5",
            "v1.1",
            "v1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45233.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.144943135Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45233.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45233",
        "https://www.vulncheck.com/advisories/htmly-cms-path-traversal-via-oldfile-parameter-in-autosave",
        "https://github.com/danpros/htmly",
        "https://gist.github.com/mrgr4yhat/c4df971eafa272ac8c86c15e2829b7fe"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45233.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45233",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522245,
  "published_at": "2026-06-25T15:50:00.181+00:00"
}