Vulnerability-Lookup

FKIE_CVE-2026-33710

Vulnerability from fkie_nvd - Published: 2026-04-10 19:16 - Updated: 2026-06-17 10:37

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, REST API keys are generated using md5(time() + (user_id * 5) - rand(10000, 10000)). The rand(10000, 10000) call always returns exactly 10000 (min == max), making the formula effectively md5(timestamp + user_id*5 - 10000). An attacker who knows a username and approximate key creation time can brute-force the API key. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

References

URL	Tags
security-advisories@github.com	https://github.com/chamilo/chamilo-lms/commit/4448701bb8ec557e94ef02d19c72cbe9c49c2d09	Patch
security-advisories@github.com	https://github.com/chamilo/chamilo-lms/commit/e7400dd840586ae134b286d0a2374f3d269a9a9d	Patch
security-advisories@github.com	https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-rpmg-j327-mr39	Vendor Advisory

Impacted products

Vendor	Product	Version
chamilo	chamilo_lms	*
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0
chamilo	chamilo_lms	2.0.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "chamilo-lms",
          "vendor": "chamilo",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.11.38"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0-alpha.1, \u003c 2.0.0-RC.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A4D0C5D2-6FA0-4532-8E3D-4EA111A50621",
              "versionEndExcluding": "1.11.38",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha1:*:*:*:*:*:*",
              "matchCriteriaId": "4AF7661F-C1F7-4CAB-BBDF-FC5BF7F5BEB8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha2:*:*:*:*:*:*",
              "matchCriteriaId": "FE56AF71-9D53-42C6-980D-09E1C418ED87",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha3:*:*:*:*:*:*",
              "matchCriteriaId": "01195674-9E1A-4C07-B7D3-0F0CC2E6511B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha4:*:*:*:*:*:*",
              "matchCriteriaId": "BAE63449-5A56-4302-A4BF-F3D19FC96A80",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha5:*:*:*:*:*:*",
              "matchCriteriaId": "A84A06F9-5AB7-4703-8153-33AC68882B95",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta1:*:*:*:*:*:*",
              "matchCriteriaId": "B91302A3-53DE-4ED0-BAAB-FE9DA03F8242",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta2:*:*:*:*:*:*",
              "matchCriteriaId": "46008D4A-96F7-4E04-8256-E115AAAE3383",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta3:*:*:*:*:*:*",
              "matchCriteriaId": "6E2BCAFF-D44B-4E67-998A-DF855E27606B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "D2E7D018-E4C2-45F5-8D9A-DAC947173607",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "DAF96697-6B6D-459D-9510-E5CEEDC2859B",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, REST API keys are generated using md5(time() + (user_id * 5) - rand(10000, 10000)). The rand(10000, 10000) call always returns exactly 10000 (min == max), making the formula effectively md5(timestamp + user_id*5 - 10000). An attacker who knows a username and approximate key creation time can brute-force the API key. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3."
    }
  ],
  "id": "CVE-2026-33710",
  "lastModified": "2026-06-17T10:37:57.927",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33710",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-13T12:51:59.204900Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-10T19:16:24.257",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/chamilo/chamilo-lms/commit/4448701bb8ec557e94ef02d19c72cbe9c49c2d09"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/chamilo/chamilo-lms/commit/e7400dd840586ae134b286d0a2374f3d269a9a9d"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-rpmg-j327-mr39"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-330"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

CVE-2026-33710 (GCVE-0-2026-33710)

Vulnerability from cvelistv5 – Published: 2026-04-10 18:59 – Updated: 2026-04-13 15:36

Title

Chamilo LMS has Weak REST API Key Generation (Predictable)

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-13 12:51 UTC

CWE

CWE-330 - Use of Insufficiently Random Values

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/chamilo/chamilo-lms/security/a…	x_refsource_CONFIRM
https://github.com/chamilo/chamilo-lms/commit/444…	x_refsource_MISC
https://github.com/chamilo/chamilo-lms/commit/e74…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
chamilo	chamilo-lms	Affected: < 1.11.38 Affected: >= 2.0.0-alpha.1, < 2.0.0-RC.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33710",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-13T12:51:59.204900Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-13T15:36:06.835Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "chamilo-lms",
          "vendor": "chamilo",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.11.38"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0-alpha.1, \u003c 2.0.0-RC.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, REST API keys are generated using md5(time() + (user_id * 5) - rand(10000, 10000)). The rand(10000, 10000) call always returns exactly 10000 (min == max), making the formula effectively md5(timestamp + user_id*5 - 10000). An attacker who knows a username and approximate key creation time can brute-force the API key. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-330",
              "description": "CWE-330: Use of Insufficiently Random Values",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-10T18:59:24.111Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-rpmg-j327-mr39",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-rpmg-j327-mr39"
        },
        {
          "name": "https://github.com/chamilo/chamilo-lms/commit/4448701bb8ec557e94ef02d19c72cbe9c49c2d09",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chamilo/chamilo-lms/commit/4448701bb8ec557e94ef02d19c72cbe9c49c2d09"
        },
        {
          "name": "https://github.com/chamilo/chamilo-lms/commit/e7400dd840586ae134b286d0a2374f3d269a9a9d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chamilo/chamilo-lms/commit/e7400dd840586ae134b286d0a2374f3d269a9a9d"
        }
      ],
      "source": {
        "advisory": "GHSA-rpmg-j327-mr39",
        "discovery": "UNKNOWN"
      },
      "title": "Chamilo LMS has Weak REST API Key Generation (Predictable)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33710",
    "datePublished": "2026-04-10T18:59:24.111Z",
    "dateReserved": "2026-03-23T17:06:05.747Z",
    "dateUpdated": "2026-04-13T15:36:06.835Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2026-33710

CVE-2026-33710 (GCVE-0-2026-33710)

Tags

Sightings

Nomenclature

Related by attack behaviour