{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.11.38"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "abb5547a46a96339dfe6079e9b7ecd329bca181a"
            }
          ],
          "repo": "https://github.com/chamilo/chamilo-lms",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-7phx-w897-4c9x"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-269",
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40291.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "2.0-RC.3"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an insecure direct object modification vulnerability in the PUT /api/users/{id} endpoint allows any authenticated user with ROLE_STUDENT to escalate their privileges to ROLE_ADMIN by modifying the roles field on their own user record. The API Platform security expression is_granted('EDIT', object) only verifies record ownership, and the roles field is included in the writable serialization group, enabling any user to set arbitrary roles such as ROLE_ADMIN. Successful exploitation grants full administrative control of the platform, including access to all courses, user data, grades, and administrative settings. This issue has been fixed in version 2.0.0-RC.3.",
  "id": "CVE-2026-40291",
  "modified": "2026-08-12T03:51:43.927238336Z",
  "published": "2026-04-14T21:37:55.490Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40291.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-7phx-w897-4c9x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40291"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Chamilo LMS has Privilege Escalation via API User Role Modification"
}