CVE-2026-33710
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Chamilo Lms
PublishedApr 10, 2026
First seenApr 10, 2026
Weakness typeCWE-330CWE-330
How to fix
Update
- chamilo chamilo_lms1.11.38 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| chamilo chamilo_lms | v < 1.11.38, 2.0.0 | 1.11.38 |
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