Open eClass Has File Upload Filter Bypass via ZIP Archive Extraction

{
  "id": "0d342462bde6b623018c4ac10754dbee8bd4f3d0023b4521e125fdbd43c53123",
  "url": "https://osv.dev/vulnerability/CVE-2026-24673",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Open eClass Has File Upload Filter Bypass via ZIP Archive Extraction",
    "summary": "The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, a file upload validation bypass vulnerability allows attackers to upload files with prohibited extensions by embedding them inside ZIP archives and extracting them using the application’s built-in decompression functionality. This issue has been patched in version 4.2.",
    "evidence": "osv:CVE-2026-24673",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-24673",
      "aliases": [
        "CVE-2026-24673",
        "GHSA-3g4j-56gp-v6wv"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gunet/openeclass",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6a98ba9fb5ce499b53d2cd0708f3080d92632dfa"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:gunet:open_eclass_platform:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "Release_4.1.2",
            "Release_4.1.1",
            "Release_3.2",
            "Release_3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-24673.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.954584467Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24673.json",
        "https://github.com/gunet/openeclass/security/advisories/GHSA-3g4j-56gp-v6wv",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-24673"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-434"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24673.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-24673",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510894,
  "published_at": "2026-02-03T16:56:59.723+00:00"
}