CVE-2026-33710

HIGH EPSS 20.5%
Published Apr 10, 20262mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 10, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
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

Threat Intelligence

EPSS Exploit Probability
20.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-330

Affected Products 11

VendorProductVersionRange
chamilochamilo_lms* <1.11.38
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any
chamilochamilo_lms2.0.0any

References 3

  • github.com https://github.com/chamilo/chamilo-lms/commit/4448701bb8ec557e94ef02d19c72cbe9c49c2d09
    Patch
  • github.com https://github.com/chamilo/chamilo-lms/commit/e7400dd840586ae134b286d0a2374f3d269a9a9d
    Patch
  • github.com https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-rpmg-j327-mr39
    Vendor Advisory

Remediation

  • github.com https://github.com/chamilo/chamilo-lms/commit/4448701bb8ec557e94ef02d19c72cbe9c49c2d09
    Patch
  • github.com https://github.com/chamilo/chamilo-lms/commit/e7400dd840586ae134b286d0a2374f3d269a9a9d
    Patch