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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.

PUBLISHED Reserved 2026-03-23 | Published 2026-04-10 | Updated 2026-04-13 | Assigner GitHub_M




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

Problem types

CWE-330: Use of Insufficiently Random Values

Product status

< 1.11.38
affected

>= 2.0.0-alpha.1, < 2.0.0-RC.3
affected

References

github.com/...lo-lms/security/advisories/GHSA-rpmg-j327-mr39

github.com/...ommit/4448701bb8ec557e94ef02d19c72cbe9c49c2d09

github.com/...ommit/e7400dd840586ae134b286d0a2374f3d269a9a9d

cve.org (CVE-2026-33710)

nvd.nist.gov (CVE-2026-33710)

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