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CVE-2026-33710

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CVE-2026-33710

Published: Apr 10, 2026

Modified: Apr 13, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

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.

VendorProductVersions

chamilo

chamilo-lms

affected
< 1.11.38
affected
>= 2.0.0-alpha.1, < 2.0.0-RC.3

Weaknesses (CWE)

CWE-330

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

References

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