CVE-2026-33710

HighCVSS 7.5/10Last modified Oct 26, 2026

Description

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

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-330

Affected software

Vendor	Product	Versions
chamilo	chamilo-lms	< 1.11.38; >= 2.0.0-alpha.1, < 2.0.0-RC.3

References

Timeline

Published: Apr 10, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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