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…

PriorityP346high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EPSS

0.29%

20.5th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
chamilo	chamilo-lms	< 1.11.38	1.11.38
chamilo	chamilo-lms	—	—
chamilo	chamilo_lms	< 1.11.38	1.11.38
chamilo	chamilo_lms	—	—

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