CVE-2026-33710Chamilo LMS has Weak REST API Key Generation (Predictable)
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-330
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Apr 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
chamilo chamilo-lms chamilo:lms (from the name) | before 1.11.38; from 2.0.0-alpha.1, < 2.0.0-RC.3 | CNA record |
chamilo chamilo_lms chamilo:chamilo_lms | before 1.11.38; 2.0.0; 2.0.0; 2.0.0; 2.0.0; 2.0.0; 2.0.0; 2.0.0; and 3 more ranges | NVD |
References
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-rpmg-j327-mr39x-refsource-confirm, vendor-advisory
- https://github.com/chamilo/chamilo-lms/commit/4448701bb8ec557e94ef02d19c72cbe9c49c2d09x-refsource-misc, patch
- https://github.com/chamilo/chamilo-lms/commit/e7400dd840586ae134b286d0a2374f3d269a9a9dx-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.