{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.11.20"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "60c78cb7c7a9ba1bd7e0269be0cec31c3e5b2494"
            },
            {
              "fixed": "dc7bfce429fbd843a95a57c184b6992c4d709549"
            }
          ],
          "repo": "https://github.com/chamilo/chamilo-lms",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "Improper sanitisation in `main/inc/lib/fileUpload.lib.php` in Chamilo LMS \u003c= v1.11.20 on Windows and Apache installations allows unauthenticated attackers to bypass file upload security protections and obtain remote code execution via uploading of `.htaccess` file. This vulnerability may be exploited by privileged attackers or chained with unauthenticated arbitrary file write vulnerabilities, such as CVE-2023-3533, to achieve remote code execution.",
  "id": "CVE-2023-3545",
  "modified": "2026-03-13T21:47:25.785618609Z",
  "published": "2023-11-28T07:15:42.913Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-125-2023-07-13-Critical-impact-Moderate-risk-Htaccess-File-Upload-Security-Bypass-on-Windows-CVE-2023-3545"
    },
    {
      "type": "FIX",
      "url": "https://github.com/chamilo/chamilo-lms/commit/dc7bfce429fbd843a95a57c184b6992c4d709549"
    },
    {
      "type": "EVIDENCE",
      "url": "https://starlabs.sg/advisories/23/23-3545/"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}