Weak Password Recovery Mechanism for Forgotten Password in chamilo/chamilo-lms

{
  "id": "b6a8d6424d1009d68b8d468cc42e31d84494684e7ea9df4e8c34cb16ddf17999",
  "url": "https://osv.dev/vulnerability/CVE-2026-33707",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Weak Password Recovery Mechanism for Forgotten Password in chamilo/chamilo-lms",
    "summary": "Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, the default password reset mechanism generates tokens using sha1($email) with no random component, no expiration, and no rate limiting. An attacker who knows a user's email can compute the reset token and change the victim's password without authentication. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.",
    "evidence": "osv:CVE-2026-33707",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-33707",
      "aliases": [
        "CVE-2026-33707",
        "GHSA-f27g-66gq-g7v2"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/chamilo/chamilo-lms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "abb5547a46a96339dfe6079e9b7ecd329bca181a"
                },
                {
                  "fixed": "078d7e5b77679fa7ccfcd6783bd5cc683db0bda8"
                },
                {
                  "fixed": "750a45312a0d5c3ad60dbfbd0d959ca40be4a18c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.11.38"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "078d7e5b77679fa7ccfcd6783bd5cc683db0bda8"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "750a45312a0d5c3ad60dbfbd0d959ca40be4a18c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.11.36",
            "v2.0.0-RC.2",
            "v2.0.0-RC.1",
            "v2.0.0-beta.3",
            "v2.0.0-beta.1",
            "v2.0.0-alpha.5",
            "v2.0.0-alpha.4",
            "v2.0.0-alpha.3",
            "v1.11.32",
            "v1.11.30",
            "v1.11.30-rc.1",
            "v2.0.0-alpha.2",
            "v1.11.28",
            "v2.0.0-alpha.1",
            "v1.11.26",
            "v1.11.26-rc.1",
            "v1.11.24",
            "v1.11.22",
            "v1.11.22-beta.2",
            "v1.11.22-beta.1",
            "v1.11.20-beta.1",
            "v1.11.20",
            "v1.11.18",
            "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-2026-33707.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.304952132Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33707.json",
        "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-f27g-66gq-g7v2",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-33707",
        "https://github.com/chamilo/chamilo-lms/commit/078d7e5b77679fa7ccfcd6783bd5cc683db0bda8",
        "https://github.com/chamilo/chamilo-lms/commit/750a45312a0d5c3ad60dbfbd0d959ca40be4a18c"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-640"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33707.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-33707",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518772,
  "published_at": "2026-04-10T18:52:54.097+00:00"
}