CVE Explorer

CVE-2026-34602

Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the /api/course_rel_users endpoint is vulnerable to Insecure Direct Object Reference (IDOR), allowing an authenticated attacker to modify the user parameter in the request body to enroll any arbitrary user into any course without proper authorization checks. The backend trusts the user-supplied input for the user field and performs no server-side verification that the requester owns the referenced user ID

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5e4e4f59c69adb35a030e1348a9c7578bd33ccf4644fe85ef4a548e213447b98

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"chamilo-lms","vendor":"chamilo","versions":[{"status":"affected","version":"< 2.0.0-RC.3"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:8a166be9c7bd36df8aea2515b9dc1f65dc6fa4c7147ad8e4959685049c0eb8cf · sha256:4eec8efbbe7bebc9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:8a166be9c7bd36df8aea2515b9dc1f65dc6fa4c7147ad8e4959685049c0eb8cf · sha256:4eec8efbbe7bebc9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8a166be9c7bd36df8aea2515b9dc1f65dc6fa4c7147ad8e4959685049c0eb8cf · sha256:4eec8efbbe7bebc9… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions

{"name":"https://github.com/chamilo/chamilo-lms/commit/2a9f060fa9d50fc9a92ed93af774d2619642df92","tags":["x_refsource_MISC"],"url":"https://github.com/chamilo/chamilo-lms/commit/2a9f060fa9d50fc9a92ed93af774d2619642df92"}

cve_program_cvelist_v5reference
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{"name":"https://github.com/chamilo/chamilo-lms/commit/bd2ba34c2e74475587e38c74c90c2934e69c8779","tags":["x_refsource_MISC"],"url":"https://github.com/chamilo/chamilo-lms/commit/bd2ba34c2e74475587e38c74c90c2934e69c8779"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8a166be9c7bd36df8aea2515b9dc1f65dc6fa4c7147ad8e4959685049c0eb8cf · sha256:4eec8efbbe7bebc9… · /containers/cna/references/2

{"name":"https://github.com/chamilo/chamilo-lms/commit/c9c30cdc48afae57cd6ab012ae2eceafd351a40e","tags":["x_refsource_MISC"],"url":"https://github.com/chamilo/chamilo-lms/commit/c9c30cdc48afae57cd6ab012ae2eceafd351a40e"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8a166be9c7bd36df8aea2515b9dc1f65dc6fa4c7147ad8e4959685049c0eb8cf · sha256:4eec8efbbe7bebc9… · /containers/cna/references/3

{"name":"https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3","tags":["x_refsource_MISC"],"url":"https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8a166be9c7bd36df8aea2515b9dc1f65dc6fa4c7147ad8e4959685049c0eb8cf · sha256:4eec8efbbe7bebc9… · /containers/cna/references/4

{"name":"https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-x373-8j9j-g5pj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-x373-8j9j-g5pj"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8a166be9c7bd36df8aea2515b9dc1f65dc6fa4c7147ad8e4959685049c0eb8cf · sha256:4eec8efbbe7bebc9… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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