CI4MS: Unrestricted PHP File Upload via Theme Installation Leads to Authenticated Remote Code Execution

{
  "id": "222d3cb93331c36951805fb90ec1beb27096899a90d6895569af949e6211ea23",
  "url": "https://osv.dev/vulnerability/CVE-2026-41587",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CI4MS: Unrestricted PHP File Upload via Theme Installation Leads to Authenticated Remote Code Execution",
    "summary": "CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0.0 to before version 0.31.7.0, a theme upload feature allows any authenticated backend user with theme-upload permission to achieve remote code execution (RCE) by uploading a crafted ZIP file. PHP files inside the ZIP are installed into the web-accessible public/ directory with no extension or content filtering, making them directly executable via HTTP. This issue has been patched in version 0.31.7.0.",
    "evidence": "osv:CVE-2026-41587",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-41587",
      "aliases": [
        "CVE-2026-41587",
        "GHSA-fw49-9xq4-gmx6"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ci4-cms-erp/ci4ms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "fb60f5a96a76953c1c24740fc5d616c765d0aec6"
                },
                {
                  "fixed": "adb241b82b8b3369358530289e90f123ee77a9a6"
                },
                {
                  "fixed": "b969465e71eacd9eb57014ad1fce1fc34fa7bca0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.26.0.0"
                      },
                      {
                        "fixed": "0.31.7.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b969465e71eacd9eb57014ad1fce1fc34fa7bca0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.31.6.0",
            "0.31.5.0",
            "0.31.4.0",
            "0.31.3.0",
            "0.31.2.0",
            "0.31.1.0",
            "0.31.0.0",
            "0.28.6.0",
            "0.28.5.0",
            "0.28.4.0",
            "0.28.3.0",
            "0.28.0.0",
            "0.27.0.0",
            "0.26.3.4",
            "0.26.3.3",
            "0.26.3.2",
            "0.26.3.1",
            "0.26.3.0",
            "0.26.2.0",
            "0.26.1.0",
            "0.26.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41587.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.289841558Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41587.json",
        "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fw49-9xq4-gmx6",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-41587",
        "https://github.com/ci4-cms-erp/ci4ms/commit/b969465e71eacd9eb57014ad1fce1fc34fa7bca0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-434"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41587.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-41587",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519833,
  "published_at": "2026-05-07T03:14:38.631+00:00"
}