Security advisory

{
  "id": "1acf196a5ad3d9e8435f8454924a6790696b2c279ab341cf0e329597a4b55479",
  "url": "https://osv.dev/vulnerability/CVE-2021-31933",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-31933",
    "summary": "A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.",
    "evidence": "osv:CVE-2021-31933",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-31933",
      "aliases": [
        "CVE-2021-31933"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/chamilo/chamilo-lms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "25d89346c1b5f73b6b8d969971b4e402dd89d7e5"
                },
                {
                  "fixed": "229302139e8d23bf6862183cf219b967f6e2fbc1"
                },
                {
                  "fixed": "f65d065061a77bb2e84f73217079ce3998cf3453"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:chamilo:chamilo:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.11.14"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "229302139e8d23bf6862183cf219b967f6e2fbc1"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f65d065061a77bb2e84f73217079ce3998cf3453"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.11.14",
            "v1.11.14-beta.1",
            "v1.11.12",
            "v1.11.10",
            "v1.11.6",
            "v1.11.6-alpha.1",
            "v1.9.8",
            "CHAMILO_1_9_6_STABLE",
            "CHAMILO_1_9_6_RC_2",
            "CHAMILO_1_9_6_RC_1",
            "CHAMILO_1_9_4_STABLE",
            "CHAMILO_1_9_4_RC_1",
            "CHAMILO_1_9_4_ALPHA_1",
            "CHAMILO_1_9_2_STABLE_QUARTER",
            "CHAMILO_1_9_2_STABLE",
            "CHAMILO_1_9_0_STABLE_3",
            "CHAMILO_1_9_0_STABLE_2",
            "CHAMILO_1_9_0_RC_1",
            "CHAMILO_1_8_8_4_STABLE",
            "CHAMILO_1_9_0_ALPHA_4",
            "CHAMILO_1_9_0_ALPHA_2",
            "CHAMILO_1_9_0_ALPHA_1",
            "CHAMILO_1_9_0_PRE_ALPHA",
            "CHAMILO_1_8_8.3_STABLE_4",
            "CHAMILO_1_8_8_2_STABLE_2",
            "CHAMILO_1_8_8_2_STABLE",
            "CHAMILO_1_8_8_2_RC_1",
            "CHAMILO_1_8_8_BETA_2",
            "CHAMILO_1_8_8_BETA_1",
            "CHAMILO_1_8_8_ALPHA",
            "CHAMILO_1_8_7_STABLE_BIS",
            "CHAMILO_1_8_7_STABLE",
            "CHAMILO_1_8_7_RC2",
            "CHAMILO_1_8_7_RC_1",
            "CHAMILO_1_8_7_ALPHA_2",
            "CHAMILO_1_8_7_ALPHA_1",
            "v1.8.6.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-31933.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:40.849862610Z",
      "provider": "osv",
      "references": [
        "https://github.com/chamilo/chamilo-lms/commit/229302139e8d23bf6862183cf219b967f6e2fbc1",
        "https://github.com/chamilo/chamilo-lms/commit/f65d065061a77bb2e84f73217079ce3998cf3453",
        "https://support.chamilo.org/projects/1/wiki/Security_issues#Issue-48-2021-04-17-Critical-impact-high-risk-Remote-Code-Execution"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-31933",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385875,
  "published_at": "2021-04-30T21:15:09+00:00"
}