CVE-2026-33710

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:chamilo:chamilo_lms::::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha1::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha2::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha3::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha4::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha5::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta1::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta2::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta3::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc1::::::
	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc2::::::

History

No history.

Information

Published : 2026-04-10 19:16

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33710

Mitre link : CVE-2026-33710

CVE.ORG link : CVE-2026-33710

JSON object : View

Products Affected

chamilo

chamilo_lms

CWE

CWE-330

Use of Insufficiently Random Values

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